Mini Origami on the Flip Side Duy Nguyen

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Double Nanowires for Hybrid Quantum Devices

Thomas Kanne , Dags Olsteins , Mikelis Marnauza , Alexandros Vekris , Juan Carlos Estrada Saldaña , Sara Loric̀ , Rasmus D. Schlosser , Daniel Ross , Szabolcs Csonka , Kasper Grove-Rasmussen , Jesper Nygård ,

• 2107926
• Version of Record online: 21 November 2021

Parallel 1D semiconductor channels connected by a superconducting strip are the core materials platform in recent theoretical proposals for exotic quantum states. In order to realize such device geometries, pairs of nanowires are grown in proximity and merged in situ by a common superconducting film. The applicability is demonstrated by implementing the double nanowires in quantum transport devices.

Spatiotemporally Controlled Access to Photoluminescence Dark State of 2D Monolayer Semiconductor by FRAP Microscopy

• 2107551
• Version of Record online: 21 November 2021

The fluorescence recovery after photobleaching (FRAP) microscopy, a powerful technology in cell biology, is first utilized to spatiotemporally manipulate and visually monitor the dynamics of photoexcited carrier in attractive 2D transition metal dichalcogenide monolayer (1L-TMD). This allows on-demand access to the photoluminescence dark state of 1L-TMD and deciphering of an interesting photoinduced dedoping effect in 1L-TMD after photodoping.

Ultrathin Gold Microelectrode Array using Polyelectrolyte Multilayers for Flexible and Transparent Electro-Optical Neural Interfaces

Woongki Hong , Jee Woong Lee , Duhee Kim , Yujin Hwang , Junhee Lee , Junil Kim , Nari Hong , Hyuk-Jun Kwon , Jae Eun Jang , Anna Rostedt Punga , Hongki Kang ,

• 2106493
• Version of Record online: 21 November 2021

Ultrathin (<10 nm) gold microelectrode arrays (MEAs) are fabricated using polyelectrolyte multilayer coating as the metallic nucleation-inducing seed layer for achieving electrical conductivity while being optically transparent. With this simple microfabrication process, the mechanical flexibility and electrochemical properties of the transparent electrodes are significantly improved for efficient electro-optical neural interfaces. The biocompatibility of the MEAs for neuronal culture is also validated.

A New End Group on Nonfullerene Acceptors Endows Efficient Organic Solar Cells with Low Energy Losses

Youwen Pan , Xiangjun Zheng , Jing Guo , Zeng Chen , Shuixing Li , Chengliang He , Shounuan Ye , Xinxin Xia , Shanlu Wang , Xinhui Lu , Haiming Zhu , Jie Min , Lijian Zuo , Minmin Shi , Hongzheng Chen ,

• 2108614
• Version of Record online: 21 November 2021

A new end group by extending π-conjugation with a chlorinated thiophene ring is reported. Acceptors with strong luminescence brought about by the end group realizes energy loss mitigation of organic solar cells. Thus, the efficiencies of 17.61% and 18.21% for the binary and ternary devices are exhibited by the chemical modification of the end group.

Surface Electronic Structure Modulation of Cobalt Nitride Nanowire Arrays via Selenium Deposition for Efficient Hydrogen Evolution

Yiqiang Sun , Keke Mao , Qi Shen , Lei Zhao , Chuanxin Shi , Xiuling Li , Yanan Gao , Cuncheng Li , Kun Xu , Yi Xie ,

• 2109792
• Version of Record online: 21 November 2021

Superficial Se modification makes Co₄N nanowire arrays a more effective catalyst. Surface modification of Se on Co₄N can effectively optimize the surface electronic structure with no significant change of bulk phase structure, leading to more efficient hydrogen evolution catalytic activity in alkaline media.

Manipulating Charge Density in Nanofluidic Membranes for Optimal Osmotic Energy Production Density

• 2109210
• Version of Record online: 21 November 2021

Charge density matters. The impact of charge density in membranes on the osmotic energy harvesting is delineated by comparing the power production using isoreticular covlent-organic-framework membranes. A volcano-like curve is observed as a function of charge density and power density. The developed composition-performance relationships are expected to be leveraged to tailor the reverse electrodialysis device to achieve optimal conversion.

CsPbI₃ Nanocrystals Go with the Flow: From Formation Mechanism to Continuous Nanomanufacturing

• 2108687
• Version of Record online: 21 November 2021

This work presents a facile and scalable high-temperature nanomanufacturing of cesium lead iodide (CsPbI₃) nanocrystals (NCs) using a modular flow reactor. The flow chemistry platform integrated with multimodal in situ spectroscopy reveals a detailed understanding of the formation mechanism of CsPbI₃ NCs via the hot-injection synthetic route.

Covalent Organic Framework Membrane with Turing Structures for Deacidification of Highly Acidic Solutions

Lihong Zhou , Xiaofeng Li , Kecheng Cao , Zhimin Jia , Honghan Long , Yang Li , Guohong Tao , Ning Liu , Jie Zhang , Lijian Ma ,

• 2108178
• Version of Record online: 21 November 2021

A novel covalent organic framework membrane with bidirectional anisotropic Turing structures is synthesized for the first time via interfacial polymerization and used for deacidification of highly acidic wastewaters. The interception rate of the membrane to various metal ions is 100% and the permeation flux to hydrogen ion is up to 1015.7 mol L⁻¹ m⁻² in 5 m HNO₃ solution.

High-Speed Ionic Synaptic Memory Based on 2D Titanium Carbide MXene

• 2109970
• Version of Record online: 21 November 2021

Electrochemical random-access memories using multilayered 2D titanium carbide MXene that combine the speed, linearity, write noise, switching energy, and endurance metrics essential for parallel acceleration of artificial neural networks with near ideal numerical accuracy in image recognition simulations are reported. The multilayered 2D MXene films are also stable after heat treatment needed for back-end-of-line integration with Si electronics.

In-situ Investigations on Gold Nanoparticles Stabilization Mechanisms in Biological Environments Containing HSA

• 2110253
• Version of Record online: 21 November 2021

The effect of nanoparticle (NP) size and surface modification on colloidal stability in NaCl and protein solutions is studied. Two significantly different stabilization mechanisms have been investigated in detail for citrate-capped and PEGylated gold NPs. Citrate-capped NPs stabilize by protein adsorption on their surfaces while PEGylated NPs build a self-assembled ordered 3D arrangement, resulting in a long-term colloid stabilization.

3D Programmable Metamaterials Based on Reconfigurable Mechanism Modules

• 2109865
• Version of Record online: 21 November 2021

A one-degree-of-freedom reconfigurable module exhibits distinct topological transformation along multiple motion paths, accompanied by tunable mechanical properties, including Poisson's ratio, chirality, and stiffness. The modules are tessellated into 3D metamaterials to harness their reconfigurability to independently program the Poisson's ratios in orthogonal planes within a wide range of negative, positive, and even zero Poisson's ratios.

Ion-Conductive Polytitanosiloxane Networks Enable a Robust Solid-Electrolyte Interface for Long-Cycling Lithium Metal Anodes

• 2110347
• Version of Record online: 21 November 2021

A robust solid-electrolyte interphase (SEI) connected by polytitanosiloxane (PTS) is constructed via in situ condensation between tetraethyl orthosilicate/tetraethyl orthotitanate electrolyte additives and the Li anode. In the crosslinked PTS, the Si–O–Si bonds favor regular Li⁺ deposition, and strong Si–O–Ti linkages relieve the strain of volume variations and maintains the integrity of the SEI, thus synergistically improving the cycling stability.

Effect of Film Microstructure on Domain Nucleation and Intrinsic Switching in Ferroelectric Y:HfO₂ Thin Film Capacitors

• 2108876
• Version of Record online: 20 November 2021

Snapshots of instantaneous domain patterns arising during polarization reversal in polycrystalline and epitaxial Y:HfO₂ capacitors obtained by stroboscopic piezoresponse force microscopy. Convergence of Kolmogorov-Avrami-Ishibashi and nucleation limited switching models at high fields close to the thermodynamic activation value suggests a homogeneous nucleation process unaffected by film microstructure, which can be considered as approaching the intrinsic switching limit.

A Personalized Acoustic Interface for Wearable Human–Machine Interaction

Zhiwei Lin , Gaoqiang Zhang , Xiao Xiao , Christian Au , Yihao Zhou , Chenchen Sun , Zhihao Zhou , Rong Yan , Endong Fan , Shaobo Si , Lei Weng , Shaurya Mathur , Jin Yang , Jun Chen ,

• 2109430
• Version of Record online: 20 November 2021

A waterproof acoustic sensor (WAS) with a broad working frequency range, wearability, self-powered working manner, good frequency resolution, and low cost is proposed for wearable human–machine interaction. Such a WAS-based acoustic interface represents the advancement of high-fidelity translation platforms for human–machine interactions and supports the evolution from touch-based devices to speech-operated electronics systems.

Metal–Organic Frameworks-Based Fabry−Pérot Cavity Encapsulated TiO₂ Nanoparticles for Selective Chemical Sensing

Zhihuan Li , Jianxi Liu , Xiaobin Yi , Wei Wu , Fanfan Li , Zhenkang Zhu , Haiqi Li , Junqin Shi , Yadong Xu , Feng Zhou , Weimin Liu ,

• 2109541
• Version of Record online: 20 November 2021

A metal–organic frameworks-based Fabry−Pérot (F–P) cavity is constructed by sequentially spray-coating TiO₂ nanoparticles in HKUST-1 thin films through a layer-by-layer deposition strategy. Bandwidth of the cavity is tuned over a broad range by adjusting the thickness and refractive index of their diagram layers. Notably, selective sensing of chemical vapors is achieved on the F–P cavities.

Self-Powered FA_0.55MA_0.45PbI₃ Single-Crystal Perovskite X-Ray Detectors with High Sensitivity

Jinming Wu , Lixiang Wang , Anbo Feng , Shuang Yang , Ning Li , Xiaomei Jiang , Nianqiao Liu , Shengdan Xie , Xinbo Guo , Yanjun Fang , Zhaolai Chen , Deren Yang , Xutang Tao ,

• 2109149
• Version of Record online: 20 November 2021

Self-powered and highly sensitive perovskite X-ray detectors are achieved by fine control of crystal thickness and optimization of carrier transport properties. High sensitivity of 8 × 10⁴ µC Gy_air ^–1 cm^–2 and low detection limit of 27.7 nGy_air s⁻¹ are obtained without external bias, which may broaden the application of X-ray detectors when portability and adaptability are required.

Thermochromic Microcapsules Containing Chiral Mesogens Enclosed by Hydrogel Shell for Colorimetric Temperature Reporters

• 2107275
• Version of Record online: 19 November 2021

Photonic microcapsules are designed by enclosing a core of cholesteryl esters with alginate shell using double-emulsion templates. The microcapsules show high suspension stability and thermochromic property. The microcapsules report local temperatures in microenvironments through structural colors. A wide range of temperature measurement can be achieved by employing a proper set of various compositions while securing high sensitivity.

Tuning Electronic and Morphological Properties for High-Performance Wavelength-Selective Organic Near-Infrared Cavity Photodetectors

Jochen Vanderspikken , Quan Liu , Zhen Liu , Tom Vandermeeren , Tom Cardeynaels , Sam Gielen , Bruno Van Mele , Niko Van den Brande , Benoît Champagne , Koen Vandewal , Wouter Maes ,

• 2108146
• Version of Record online: 19 November 2021

Significant extension of the direct charge-transfer absorption to longer wavelengths of the well-known PBTTT:PC₆₁BM blend through polymer side chain engineering is demonstrated. When applied into an optical cavity device, the novel intercalating blend extends its employability for near-infrared detection by more than 300 nm.

Charge Transport in Single-Crystalline GaAs Nanobars: Impact of Band Bending Revealed by Terahertz Spectroscopy

• 2107403
• Version of Record online: 18 November 2021

The nanoscale electron motion in nanostructures is strongly influenced by surface properties. Far-field and near-field terahertz conductivity measurements in an array of aligned high-quality GaAs nanobars supported by quantum-mechanical calculations reveal a band bending close to the nanobar surfaces. Its prominent effects on the picosecond charge carrier dynamics lead to an enhanced localization of electrons.

Real-Time Tunable Nanoprinting-Multiplexing with Simultaneous Meta-Holography Displays by Stepwise Nanocavities

• 2110022
• Version of Record online: 18 November 2021

Dynamic switchable red–green–blue (RGB) multichannel nanoprintings based on stepwise metal-hydrogel-metal (MHM) nanocavities are originally demonstrated in real-time through utilizing hydrogel's inflation to humidity. By decoupling the amplitude/phase correlation, MHM nanocavities successfully enable the hybrid encryption of simultaneous meta-holography with independent encoding freedom in addition to nanoprinting displays. The findings are promising for tunable imaging display/storage/encryption, humidity sensors, and next-generation augmented reality technology.

An Injectable Asymmetric-Adhesive Hydrogel as a GATA6⁺ Cavity Macrophage Trap to Prevent the Formation of Postoperative Adhesions after Minimally Invasive Surgery

Xiaoqi Wu , Weihong Guo , Ling Wang , Yichao Xu , Zihan Wang , Yang Yang , Liu Yu , Junfei Huang , Yanbin Li , Hongwu Zhang , Yaobin Wu , Guoxin Li , Wenhua Huang ,

• 2110066
• Version of Record online: 18 November 2021

An injectable asymmetric-adhesive hydrogel based on the photocurable catechol-grafted hyaluronic acid is developed to prevent the development of postoperative adhesions during a minimally invasive procedure. Moreover, this hydrogel acts as a polyanion trap to neutralize scavenger receptors, thereby inhibiting the uncontrolled recruitment of GATA6+ cavity macrophages and collagen deposition.

2–2 Type PVDF-Based Composites Interlayered by Epitaxial (111)-Oriented BTO Films for High Energy Storage Density

• 2108496
• Version of Record online: 18 November 2021

2–2 type poly(vinylidene fluoride) (PVDF)-based composites interlayered with epitaxial (111)-oriented BaTiO₃ (BTO) films are successfully synthesized. The multilayered composites exhibit a high energy storage density of 20.7 J cm^-3, which is 222.6% that of pure PVDF. This approach offers a novel process to prepare 2–2 type polymer-based composites interlayered by single-crystal films, opening a unique way to enhance energy properties.

Accelerating Sulfur Redox Reactions by Topological Insulator Bi₂Te₃ for High-Performance Li-S Batteries

• 2109413
• Version of Record online: 18 November 2021

Topological insulator Bi₂Te₃ is reported as an electrocatalyst for accelerated sulfur electrochemistry. Bi₂Te₃ can not only effectively anchor soluble sulfur species but also form seamless electron transport pathways with the adsorbed polysulfides. Both the charge and discharge processes are significantly boosted by the incorporation of Bi₂Te₃. Consequently, high-efficiency lithium-sulfur batteries are obtained.

Exsolution Synthesis of Nanocomposite Perovskites with Tunable Electrical and Magnetic Properties

Jiayue Wang , Komal Syed , Shuai Ning , Iradwikanari Waluyo , Adrian Hunt , Ethan J. Crumlin , Alexander K. Opitz , Caroline A. Ross , William J. Bowman , Bilge Yildiz ,

• 2108005
• Version of Record online: 18 November 2021

Nanostructured functional oxides play an important role in enabling clean energy technologies and novel memory devices. Using thin-film La_0.6Sr_0.4FeO₃ as a model system, a novel utility of exsolution is demonstrated to fabricate self-assembled metal oxide nanocomposites with tunable electrical conductivity by more than 2 orders of magnitude and a continuous modulation of magnetization between 0 and 110 emu cm⁻³.

Precise Control of Crystal Orientation of Conjugated Molecule Enables Anisotropic Charge Transport Properties

Waqar Ali Memon , Ruimin Zhou , Yajie Zhang , Yuheng Wang , Lixuan Liu , Chen Yang , Jianqi Zhang , Adeel Liaqat , Liming Xie , Zhixiang Wei ,

• 2110080
• Version of Record online: 17 November 2021

Uniaxially aligned films are fabricated through epitaxial crystallization of conjugated small molecule films on the highly oriented polyethylene substrate. The molecules with edge-on orientation display the exceptional alignment degree, while the molecule with face-on orientation display a random orientation on oriented substrates. Such precise control of the orientation facilitates high dichroic ratios and charge transport in organic field-effect transistors.

Interface Modeling via Tailored Energy Band Alignment: Toward the Electrochemically Stabilized All-Solid-State Li-Metal Battery

Heebae Kim , Changik Im , Seokgyu Ryu , Yong Jun Gong , Jinil Cho , Seonmi Pyo , Heejun Yun , Jeewon Lee , Jeeyoung Yoo , Youn Sang Kim ,

• 2107555
• Version of Record online: 17 November 2021

All-solid-state Li-metal batteries demonstrate superior energy density and safety to conventional Li-ion batteries. However, inherent interfacial instability of solid-state electrolyte and Li-metal anode expedites the battery's electrochemical degradation. Interface modeling via energy band alignment fundamentally resolves the chronic reliability issue. The revealing results provide comprehensive understanding of interfacial phenomena and fundamental solution applicable to various all-solid-state battery types.

Antisite Defects Stabilized by Antiphase Boundaries in YFeO₃ Thin Films

Abinash Kumar , Konstantin Klyukin , Shuai Ning , Cigdem Ozsoy-Keskinbora , Mikhail Ovsyanko , Felix van Uden , Ruud Krijnen , Bilge Yildiz , Caroline A. Ross , James M. LeBeau ,

• 2107017
• Version of Record online: 16 November 2021

Complete control of multiferroic materials necessitates knowledge of the defects present and their potential role in modifying behavior. The atomic structure and chemistry of antiphase boundaries in Y-rich multiferroic YFeO₃ thin films is found to host Fe_Y antisites, which are not stable in the Y-rich film bulk. Through theory and experiment, the impact that these point and planar defects have on properties is explored.

Ultrabright and Highly Polarity-Sensitive NIR-I/NIR-II Fluorophores for the Tracking of Lipid Droplets and Staging of Fatty Liver Disease

Xiaobo Zhou , Ke Zhang , Chaojie Yang , Yuetian Pei , Lingfeng Zhao , Xiaoxia Kang , Zhenhua Li , Fuyou Li , Yuling Qin , Li Wu ,

• 2109929
• Version of Record online: 16 November 2021

An effective strategy to construct a NIR-I/NIR-II fluorescent probe with highly sensitive response to environment polarity, ultrabright emission, and superior photostability is reported. Using a NIR-I and NIR-II fluorescence imaging strategy, the as-designed probes are successfully applied to high-resolution vessel imaging, real-time and contact-free monitoring of heartbeat and respiratory, and fatty liver disease analyzing in vivo.

Doping-Modulated Strain Enhancing the Phosphate Tolerance on PtFe Alloys for High-Temperature Proton Exchange Membrane Fuel Cells

Wei Li , Dongdong Wang , Tianyang Liu , Li Tao , Yagang Zhang , Yu-Cheng Huang , Shiqian Du , Chung-Li Dong , Zhijie Kong , Ya-fei Li , Shanfu Lu , Shuangyin Wang ,

• 2109244
• Version of Record online: 16 November 2021

This Cu doping in PtFe crystals facilitates the formation of compressive strain, consequently altering the electronic structure and then enhancing the phosphate tolerance. The maximum output power of Cu-PtFe/NC in HT-PEMFC reaches as high as 793.5 and 432.6 mW cm⁻² under the condition of H₂–O₂ and H₂–air atmosphere, respectively, exceeding that of most reported ORR electrocatalysts.

Colorful Transparent Silicon Photovoltaics with Unprecedented Flexibility

• 2110435
• Version of Record online: 16 November 2021

Great all-around transparent solar cells featuring high flexibility, high transparency, and excellent performance are demonstrated. The flexibility is dramatically improved through the uniform stress distribution mechanism with the periodic hole array acting as a self-stress relief structure. The PDMS enables the creation of devices with various colors in a facile manner and provided mechanical durability and long-term stability.

Oxidase Mimic Graphdiyne for Efficient Superoxide Generation in Wide pH Ranges

• 2110192
• Version of Record online: 16 November 2021

The oxidase mimic of hemin/graphdiyne (GDY) can produce O₂ ^•− with high intensity in acidic, alkaline, and neutral environments, and the strength of O₂ ^•− increases with the increase in pH value. The material can realize high-performance glutathione sensing in cell lysate.

RKKY Exchange Bias Mediated Ultrafast All-Optical Switching of a Ferromagnet

• 2107490
• Version of Record online: 16 November 2021

Ruderman–Kittel–Kasuya–Yosida (RKKY) exchange coupled mediated all-optical switching of a ferromagnet is a promising route to realize ultrafast storage/memory devices. An experimental proof of 3.5 ps switching of a ferromagnet mediated by RKKY coupling is demonstrated with exchange coupled CoGd/Pt/[Co/Pt] _n ferrimagnet-ferromagnet heterostructures. The extended microscopic three temperature model qualitatively describes the experimental ultrafast magnetization reversal dynamics.

Bioinspired Stochastic Design: Tough and Stiff Ceramic Systems

• 2108492
• Version of Record online: 16 November 2021

Recently researchers have begun to identify the full range of benefits associated with natural disordered materials. A new class of high-performance ceramics is defined featuring bio-inspired stochasticity in their architectures. These materials are manufactured using scalable techniques enabling the precise control over the degree of stochasticity and ceramic cut depth, two parameters that are key to achieving a damage-tolerant material.

Ultrathin Aluminum Nanosheets Grown on Carbon Nanotubes for High Performance Lithium Ion Batteries

• 2109112
• Version of Record online: 14 November 2021

Ultrathin Al nanosheets grown on carbon nanotubes (Al-NS-CNTs) with a corolla-like structure are proposed as anode material for lithium ion batteries (LIBs). With the dominant exposed Al(111) facets, the composites are endowed with ideal structure stability during lithiation and delithiation cycling, exhibiting a high initial capacity of 990 mAh g⁻¹ at 1 C and excellent cycling performance without capacity fading after 500 cycles.

The Janus Nature of Nanohydroxyapatite in Tumor Progression

Jia-ying He , Min-juan Shen , Qian-qian Wan , Yu-song Zhang , Yu-hong Xiao , Jian-hua Wei , Yuan Liu , Jian-fei Yan , Mei-chen Wan , Ke-hui Xu , Kai Jiao , Franklin Tay , Li-na Niu ,

• 2107599
• Version of Record online: 14 November 2021

Janus, the two-faced deity in Roman mythology, symbolizes the past as well as the future. In the past, people have viewed nanohydroxyapatite from the single angle of a disease promoting agent. Only by looking at nanohydroxyapatite from a different angle one identifies its future potential in treating diseases.

Near-Infrared Afterglow and Related Photochromism from Solution-Grown Perovskite Crystal

• 2110663
• Version of Record online: 14 November 2021

A perovskite single crystal is grown in solution via a hydrothermal reaction. Through a co-doping strategy of both Na⁺ and Yb³⁺, a dual-band emission comprising both visible and near-infrared (NIR) is activated by self-trapped excitons and lanthanide ions, respectively. Intriguingly, a long-lasting afterglow at NIR band (≈7200 s) and a simultaneous photochromism are both observed after ceasing the excitation.

Robust and Reprocessable Artificial Muscles Based on Liquid Crystal Elastomers with Dynamic Thiourea Bonds

• 2110360
• Version of Record online: 14 November 2021

A new class of exchangeable liquid crystal elastomers (LCEs) incorporating thiourea bonds is developed, which offers various useful properties such as welding, melt- and solution reprocessing, reprogrammable actuation, and self-healing. Based on the dynamic features of LCEs, an electrically powered artificial muscle and an artificial hand are fabricated, which can undergo selective actuation by integrating a microcontroller through Joule heating.

Immobilization and Intracellular Delivery of Structurally Nanoengineered Antimicrobial Peptide Polymers Using Polyphenol-Based Capsules

• 2107341
• Version of Record online: 14 November 2021

Structurally nanoengineered antimicrobial peptide polymers (SNAPPs) are promising antimicrobial agents against multidrug-resistant bacteria. Two template-assisted methods of immobilizing SNAPPs in polyphenol-based microcapsules to facilitate delivery are reported. The immobilized SNAPPs retain their antimicrobial activity as demonstrated in Escherichia coli. Both capsule systems are internalized by alveolar macrophages with negligible cytotoxicity and are amenable to nebulization, demonstrating potential for pulmonary delivery.

Toward Achieving High Kinetics in Anodeless Li₂S Battery: Surface Modification of Cu Current Collector

• 2109759
• Version of Record online: 12 November 2021

In anodeless Li₂S batteries, Li deposits on the surface of Cu electrodes. The surface properties such as a roughness and a native oxide affect the Li metal deposition/dissolution. The native oxide substantially affects the nucleation behavior of Li and the reaction of the native oxide with the polysulfides strongly affects the deposited Li metal morphology and porosity. As a result, the Cu electrode with the native oxide shows porous Li metal structure resulting in poor cycle stability and kinetics. When the native oxide on the surface is removed, high cycling stability and superior kinetics are achieved in anodeless Li₂S batteries.

Kirigami Reconfigurable Gradient Metasurface

• 2107699
• Version of Record online: 12 November 2021

Kirigami-based reconfigurable gradient metasurface (KRGM) is proposed for the tuning of electromagnetic wavefront by changing the folding pattern of the meta-structure. The concept is demonstrated both in theory and experiment by a series of passive meta-devices, which enable functionalities including a switchable anomalous refractor, tunable focusing meta-lens, and achromatic metalens.

Interface-Enhanced Ferromagnetism with Long-Distance Effect in van der Waals Semiconductor

• 2108953
• Version of Record online: 12 November 2021

Through the construction of a W/Cr₂Ge₂Te₆ heterostructure with annealing treatment, the Curie temperature of Cr₂Ge₂Te₆ is raised above 150 K with strong perpendicular magnetic anisotropy, which is attributed to the interfacial orbital hybridization. Due to the weak interlayer coupling, the interfacial enhancement can be effective in long distance. The enhanced ferromagnetism can be controlled by spin-orbit torque with low current density.

Binder-Free ω-Li₃V₂O₅ Catalytic Network with Multi-Polarization Centers Assists Lithium–Sulfur Batteries for Enhanced Kinetics Behavior

• 2110665
• Version of Record online: 12 November 2021

A spraying/discharging strategy is employed to fabricate binder-free ω-Li₃V₂O₅ catalytic network with multi-polarization centers, which have strong positive and negative electric potential, exhibit high polarity and enough sites that can capture polysulfides effectively. In addition, the ω-Li₃V₂O₅ can catalyze polysulfides to short-chains sufficiently with a low catalyst loading. Furthermore, the networks facilitate electronic/ionic transmission and thereby boost their electrochemical performances.

Discovery of a Novel Amino Lipid That Improves Lipid Nanoparticle Performance through Specific Interactions with mRNA

Mark Cornebise , Elisabeth Narayanan , Yan Xia , Edward Acosta , Lei Ci , Hillary Koch , Jaclyn Milton , Staci Sabnis , Timothy Salerno , Kerry E. Benenato ,

• 2106727
• Version of Record online: 12 November 2021

A squaramide amino lipid that promotes specific interactions with mRNA and does not rely solely on ionic interactions for efficient complexation and assembly into lipid nanoparticles (LNPs) is described. Molecular dynamics simulations provide insight into which interactions may be responsible for the unique particle characteristics. This offers the exciting possibility that in silico lipid/mRNA modeling can improve LNP component design.

Roadmap for Ferroelectric Domain Wall Nanoelectronics

• 2110263
• Version of Record online: 12 November 2021

Ferroelectric domain walls are electrically programmable nanoscale interfaces that are highly promising for the development of low-energy electronics for applications in memory, logic, and brain-inspired computing. In this article, the authors review the latest developments and outline key device issues, material challenges, and opportunities for the accelerated engineering and commercialization of domain wall technology.

Absorption Spectrum-Compensating Configuration Reduces the Energy Loss of Nonfullerene Organic Solar Cells

• 2109735
• Version of Record online: 11 November 2021

An effective light-deflecting pattern is introduced to nonfullerene organic solar cells to improve energy conversion efficiency in the blue region. The normal incidence light is guided into a cavity-like chamber and mostly captured by the active layer, resulting in broadband absorption enhancement. The optimized device based on all A-D-A type nonfullerene acceptors achieves the highest reported efficiency of approaching 18%.

Toward Stable and Efficient Perovskite Light-Emitting Diodes

• 2109495
• Version of Record online: 11 November 2021

Perovskite LEDs show great promise for next-generation display and lighting applications. However, many scientific and technical challenges remain, preventing perovskite LEDs from advancing further into practical applications. This review attempts to outline key mechanisms affecting device efficiency and operational stability as well as the strategies for improvements, exemplified by a selection of recent representative works in the field.

Superior Antidegeneration Hierarchical Nanoengineered Wicking Surfaces for Boiling Enhancement

• 2108836
• Version of Record online: 11 November 2021

Three-tier hierarchical micro/nanostructrued surface with superior wicking capability and anti-wicking-degeneration performance shows excellent resistance to volatile organic compound contamination in the atmosphere, thus sustainably enhancing boiling heat transfer. Previously unidentified coexistence of several dry areas underneath a single bubble on a structured surface is visualized, revealing a new mechanism for boiling heat transfer enhancement.

Understanding the Role of Element Grain Boundary Diffusion Mechanism in Nd–Fe–B Magnets

Lizhong Zhao , Jiayi He , Wei Li , Xiaolian Liu , Jian Zhang , Lin Wen , Zhenhua Zhang , Jinwen Hu , Jiasheng Zhang , Xuefeng Liao , Ke Xu , Wenbing Fan , Wenyue Song , Hongya Yu , Xichun Zhong , Zhongwu Liu , Xuefeng Zhang ,

• 2109529
• Version of Record online: 10 November 2021

High-abundance Ce and La coordinate the diffusion behavior of Tb in Nd–Fe–B magnets, resulting in deep infiltration and uniform distribution of Tb. This is important to enhance the efficiency of Tb. This work clarifies the synergistic effects of these three rare earths on the grain boundary diffusion by using both atomic-scale characterizations and computational simulations.

CO₂ Dominated Bifunctional Catalytic Sites for Efficient Industrial Exhaust Conversion

Man Dong , Jie Zhou , Jun Zhong , Hai-Tao Li , Chun-Yi Sun , Yi-Dong Han , Jun-Ning Kou , Zhen-Hui Kang , Xin-Long Wang , Zhong-Min Su ,

• 2110136
• Version of Record online: 10 November 2021

Ni bridged covalent organic framework layers show efficient photoconversion from the actual industrial exhaust to syngas by CO₂ aided bifunctional photocatalytic interface. Under 10% CO₂, the apparent quantum efficiency of CO achieves 3.96%. Moreover, the conversion rate of the catalyst to the flue gas could reach 672 L kg⁻¹ h⁻¹ under ideal conditions.

Localized Electron Density Redistribution in Fluorophosphate Cathode: Dangling Anion Regulation and Enhanced Na-Ion Diffusivity for Sodium-Ion Batteries

Jinjin Wang , Jinzhao Kang , Zhen-Yi Gu , Qinghua Liang , Xiangyuan Zhao , Xiaomei Wang , Ruisheng Guo , Hong Yu , Cheng-Feng Du , Xing-Long Wu ,

• 2109694
• Version of Record online: 10 November 2021

Cl-doped Na₃V₂(PO₄)₂O₂F (NVPO_2−xCl_xF) cathode material is prepared for the first time via a facile chemical vapor replacing process. The density functional theory investigations verify that the Cl doping tunes the electronic structure and causes the electron redistribution on vanadium center/dangling anions. Therefore, a revised redox behavior of vanadium and increased Na⁺ diffusivity are achieved, enabling superior rate property.

Unleash the Capacity Potential of LiFePO₄ through Rocking-Chair Coordination Chemistry

• 2108692
• Version of Record online: 10 November 2021

The LiFePO₄ cathode using zinc acetate–diethanolamine complex (Zn(OAc)₂·DEA) as a functional binder reaches a capacity of 169 mAh g⁻¹ at the rate of 0.2C, which is close to the theoretical value. This is achieved by the rocking-chair coordination chemistry between the N atom and Zn²⁺, Fe²⁺, or Fe³⁺ in discharge/charge states.

Structural Engineering in Graphite-Based Metal-Ion Batteries

Pan Luo , Cheng Zheng , Jiawei He , Xin Tu , Wenping Sun , Hongge Pan , Yanping Zhou , Xianhong Rui , Bing Zhang , Kama Huang ,

• 2107277
• Version of Record online: 10 November 2021

Structural engineering of graphite including expanded graphite, graphite intercalation compounds, and porous graphite, as well as electrolyte engineering for enhancing the electrochemical performance of the graphite-based metal ion batteries are summarized, aiming to make a comparison between various strategies and provide future direction in this area.

Complementary Dynamic Chemistries for Multifunctional Polymeric Materials

• 2108431
• Version of Record online: 10 November 2021

Combining distinct dynamic chemistries can transform static polymers to responsive materials. Using noncovalent and dynamic covalent linkers can lead to materials, which combine the responsiveness of each linker, or synergistically use the advantages of each linker. This review focuses on the unique chemistries, materials properties, and applications enabled by powerful combinations of multiple types of dynamic linkers into macromolecules.

Bright and Efficient Pure Red Perovskite Nanocrystals Light-Emitting Devices via In Situ Modification

Xinyu Shen , Xiaoyu Zhang , Zhenyu Wang , Xupeng Gao , Yu Wang , Po Lu , Xue Bai , Junhua Hu , Zhifeng Shi , William W. Yu , Yu Zhang ,

• 2110048
• Version of Record online: 10 November 2021

In situ metal halide modification strategy is proposed to prepare CsPb(Br/I)₃ perovskite nanocrystals (PNCs) with a photoluminescence quantum yield (PLQY) of 92.0% due to the decreased nonradiative recombination rates and increased radiative recombination rates. The luminance reached 11233 cd m⁻² for pure red PNC light-emitting devices with a Commission Internationale de l'Eclairage 1931 color coordinate (0.704, 0.292) due to improved PLQY and balanced carrier injection.

High-Performance Magnetic FePt (L1₀) Surface Microrollers Towards Medical Imaging-Guided Endovascular Delivery Applications

Ugur Bozuyuk , Eylul Suadiye , Amirreza Aghakhani , Nihal Olcay Dogan , Jelena Lazovic , Mehmet Efe Tiryaki , Martina Schneider , Alp Can Karacakol , Sinan Ozgun Demir , Gunther Richter , Metin Sitti ,

• 2109741
• Version of Record online: 10 November 2021

FePt (L1₀) film-coated magnetic surface microrollers outperform the previous ones with other magnetic films during surface locomotion against the fluidic flow direction. They also exhibit high imaging contrast during magnetic resonance and photoacoustic medical imaging-based tracking of the microrollers in ex vivo settings and high biocompatibility with macrophages and endothelial cells in vitro.

Layered Superconductor Cu_0.11TiSe₂ as a High-Stable K-Cathode

• 2109893
• Version of Record online: 10 November 2021

The layered superconductor Cu_0.11TiSe₂, which can be obtained by controlled intercalation of TiSe₂ with Cu, has increased electrons and ions transfer rates. It exhibits a superior rate capability and long cycling stability as a cathode of potassium-ion batteries. Cu ions also play a role as a pillar between layers, delivering the highly reversible phase transformations during cycles.

TaCo₂Te₂: An Air-Stable, High Mobility Van der Waals Material with Probable Magnetic Order

• 2108920
• Version of Record online: 10 November 2021

Van der Waals (vdW) materials are an indispensable part of functional device technology. Recently, the search for magnetic vdW materials has intensified due to the realization of magnetism in 2D. However, metallic magnetic vdW systems are still uncommon and they rarely show high-mobility charge carriers. Using chemical reasoning, it is found that TaCo₂Te₂ is an air-stable, high-mobility, magnetic vdW material.

Organic Electrolytes for pH-Neutral Aqueous Organic Redox Flow Batteries

• 2108777
• Version of Record online: 10 November 2021

The pH-neutral aqueous organic redox flow battery (AORFB) represents a safe and cost-effective energy storage technology. Redox-active organic compounds are critical components that directly determine AORFB performances. This review summarizes the recent progress in molecular engineering of redox-active compounds targeting exclusively pH-neutral AORFB and concludes the general design principles that can be used as guidelines. Challenges and perspectives are also discussed.

Heterogeneous Single Atom Environmental Catalysis: Fundamentals, Applications, and Opportunities

• 2108381
• Version of Record online: 10 November 2021

The study of single atom catalysts (SACs) has emerged as a frontier in the catalytic realm, which brought flourish opportunity for traditional environmental catalysis. The recent developments of SACs in the catalytic environmental decontamination are summarized. With deep digs into catalyst preparation, catalytic mechanism, and practical applications, a salutary guidance for the exploration of future environmental SACs is provided.

A Review of Performance Attenuation and Mitigation Strategies of Lithium-Ion Batteries

• 2107769
• Version of Record online: 09 November 2021

This review comprehensively summarizes the attenuation mechanisms of lithium ion batteries from the aspects of cathode materials, anode materials, electrolytes, diaphragm, current collectors, and their mitigation strategies. The related conclusions and perspectives in this review will provide the necessary support for the improvement of power battery performance and sustainable development of electric vehicles.

N-Type Conjugated Polymer as Multi-Functional Interfacial Layer for High-Performance and Ultra-Stable Self-Powered Photodetectors Based on Perovskite Nanowires

• 2108356
• Version of Record online: 09 November 2021

High-performance and ultra-stable self-powered photodetectors (PDs) based on perovskite nanowires (NWs) are achieved by using n-type conjugated polymer poly{2,5-bis(2-dodecylhexadecyl)-3,6-di(thiophen-2-yl)pyrrolo-[3,4-c]pyrrole-1,4(2H,5H)-dione-alt-(E)-1,2-bis(3-cyanothiophen-2-yl)ethene} as multi-functional interfacial layer. To the best of the authors' knowledge, the performance and stability achieved herein represent the best results ever reported for perovskite PDs. More encouragingly, the application of NWs PDs for solution-processed reflective-mode pulse oximetry is also demonstrated.

Pressure-Tailored Band Engineering for Significant Enhancements in the Photoelectric Performance of CsI₃ in the Optical Communication Waveband

Zonglun Li , Quanjun Li , Haiyan Li , Lei Yue , Dianlong Zhao , Fuyu Tian , Qing Dong , Xueting Zhang , Xilian Jin , Lijun Zhang , Ran Liu , Bingbing Liu ,

• 2108636
• Version of Record online: 09 November 2021

This study achieves a significantly increased photocurrent by almost five orders of magnitude under visible light illumination and an extension of the spectral response range to the optical communication waveband (1650 nm) in CsI₃ via pressure-tailored band engineering. These findings provide new insights for designing wide-range photosensitive, high-gain, and operable-at-ultralow-bias-input photoelectric functional materials.

Heterogeneous MoSe₂/Nitrogen-Doped-Carbon Nanoarrays: Engineering Atomic Interface for Potassium-Ion Storage

Da Xu , Ling Chen , Xiaozhi Su , Hongliang Jiang , Cheng Lian , Honglai Liu , Long Chen , Yanjie Hu , Hao Jiang , Chunzhong Li ,

• 2110223
• Version of Record online: 09 November 2021

The heterogenous MoSe₂/N-doped carbon nanoarrays demonstrate a brilliant performance as K-ion batteries anode materials with greatly enhanced reversibility. The as-formed heterointerface greatly weakens the KSe bond of the discharge product (K₂Se) by optimizing its geometric structure, leading to the easy regeneration of the MoSe bond. The K-ion storage mechanism and structure-performance relationship are further clarified during de-/potassiation.

A Universal Strategy for Constructing Robust and Antifouling Cellulose Nanocrystal Coating

Wenshuai Yang , Mingfei Pan , Jiawen Zhang , Ling Zhang , Fengcai Lin , Xiong Liu , Charley Huang , Xing-Zhen Chen , Jianmei Wang , Bin Yan , Hongbo Zeng ,

• 2109989
• Version of Record online: 09 November 2021

A universal and scalable cellulose nanocrystals (CNCs) coating strategy is proposed and developed via robustly grafting CNCs onto various substrates by constructing an intermedia adhesive layer. The highly dense CNCs coating exhibits outstanding antifouling and anti-wear performance for water purification. This study provides a useful method for addressing a long-standing challenge of the integration of rigid materials as robust surface coatings.

Reduced Spin-Orbit Torque Switching Current by Voltage-Controlled Easy-Cone States

• 2107944
• Version of Record online: 07 November 2021

The reduction in spin-orbit torque (SOT) switching current by the voltage-controlled magnetic easy-cone state is demonstrated. In Ta/CoFeB/Pt/MgO structures, the easy-cone state is efficiently modulated by the gate voltage, resulting in the reduction of the SOT switching current by up to 50%. The reversible and nonvolatile nature of the voltage-controlled easy-cone state facilitates multilevel spintronic devices.

Cu₁₂Sb₄S₁₃ Quantum Dots/Few-Layered Ti₃C₂ Nanosheets with Enhanced K⁺ Diffusion Dynamics for Efficient Potassium Ion Storage

• 2108574
• Version of Record online: 07 November 2021

A class of CAS-Ti₃C₂ composites with excellent electrochemical performances is reported as an advanced nanostructured electrode for potassium ion batteries (PIBs). The strong synergistic interaction between the Cu₁₂Sb₄S₁₃ quantum dots and few-layered Ti₃C₂ nanosheets endows the hybrid electrode with a high conductivity network, robust structural stability, and short K⁺ diffusion path for boosting the capacity, rate ability, and stability of PIBs.

Gallium-Based Liquid Metal Reaction Media for Interfacial Precipitation of Bismuth Nanomaterials with Controlled Phases and Morphologies

Mohannad Mayyas , Khashayar Khoshmanesh , Priyank Kumar , Maedehsadat Mousavi , Jianbo Tang , Mohammad B. Ghasemian , Jiong Yang , Yifang Wang , Mahroo Baharfar , Md. Arifur Rahim , Wanjie Xie , Francois-Marie Allioux , Rahman Daiyan , Rouhollah Jalili , Dorna Esrafilzadeh , Kourosh Kalantar-Zadeh ,

• 2108673
• Version of Record online: 07 November 2021

Gallium-based liquid alloys establish liquid–liquid interfaces with electrolytic solutions. Applying a cathodic voltage to the liquid–liquid interface of eutectic gallium–bismuth binary liquid alloy triggers a phase separation where bismuth solute atoms precipitate rapidly from the interface. Bismuth atoms precipitate from the liquid alloy as nanosized entities that can be controlled to produce bismuth and bismuth oxide nanomaterials.

Direct Detection of Fast Neutrons by Organic Semiconducting Single Crystal Detectors

Dou Zhao , Pingkun Cai , Wei Cheng , Wenbao Jia , Binbin Zhang , Menghua Zhu , Linyue Liu , Xiaoping Ouyang , Paul Sellin , Wanqi Jie , Yadong Xu ,

• 2108857
• Version of Record online: 06 November 2021

Compact semiconducting detectors based on organic single crystals for direct fast neutron detection can quantitatively measure the dose and energy of incident fast neutron flux with a fast time response and a good radiation endurance, directly breaking the detector limitation for both high-resolution fast neutron imaging and high-localized and tissue-equivalent dosimetry during cancer therapy.

Recent Progress in Perovskite-Based Reversible Photon–Electricity Conversion Devices

Chao Liang , Hao Gu , Junmin Xia , Shiliang Mei , Peiyuan Pang , Nan Zhang , Jia Guo , Ruxin Guo , Yonglong Shen , Shengchun Yang , Zhanhua Wei , Guosheng Shao , Guichuan Xing ,

• 2108926
• Version of Record online: 06 November 2021

A comprehensive overview of applications of perovskite materials in dual-functional light-emitting solar cells is presented in this review. The effects of defect passivation, interface optimization, energy level alignment, and dimensional control on the performance are highlighted. Along with its current status from existing literature, future research directions to address their challenges are also discussed.

Engineered Nanoenzymes with Multifunctional Properties for Next-Generation Biological and Environmental Applications

• 2108650
• Version of Record online: 06 November 2021

Herein, a comprehensive review of the recent developments in nanoenzymes including systematic introduction and fundamentals, nanoenzyme tailoring and synthesis, in vitro and in vivo biological application, and energy-oriented application are provided. The emerging approaches for nanoenzyme to monitor environmental pollutants, CO₂ sequestration andvalorization, and its use as a water disinfectant are summarized. Finally, the conclusion and future perspectives are presented.

Microswimmers from Toposelective Nanoparticle Attachment

• 2109175
• Version of Record online: 06 November 2021

Microswimmers hold promise for a range of applications, but current fabrication techniques suffer from limited scalability and/or compositional flexibility. Here, a modular approach to Janus particle synthesis is demonstrated, promising designer microswimmers via attachment of functional nanoparticles to microparticle supports. The photocatalytic microswimmers display characteristic orientation-dependent 3D active motility, suggesting strategies exploiting the complex interplay between illumination direction and motion.

FeP Modulated Adsorption with Hydrogen and Phosphate Species for Hydrogen Oxidation in High-Temperature Polymer Electrolyte Membrane Fuel Cells

Shiqian Du , Yingying Li , Xing Wu , Gen Huang , Yujie Wu , Jujia Zhang , Jin Zhang , Shanfu Lu , Yi Cheng , Li Tao , Shuangyin Wang ,

• 2106758
• Version of Record online: 06 November 2021

Platinum-based hydrogen oxidation reaction (HOR) catalysts obtained enhance High-temperature polymer electrolyte membrane fuel cells (HT-PEMFC) performance with low loading mass of noble metal by introducing iron phosphide for adsorption modulation. Iron phosphide decreases the hydrogen binding energy on platinum and prepares to absorb the phosphate species, facilitating the hydrogen dissociation and promoting the proton transfer process, thus improving the HOR kinetics.

Highly Enhanced Triboelectric Performance from Increased Dielectric Constant Induced by Ionic and Interfacial Polarization for Chitosan Based Multi-Modal Sensing System

Jingzhe Sun , Hyeongsub Choi , Seokjun Cha , Dahye Ahn , Minseok Choi , Sangki Park , Yujang Cho , Jiwoo Lee , Tae-eon Park , Jong-Jin Park ,

• 2109139
• Version of Record online: 06 November 2021

By adding ions and molecules and adjusting the pH, the dielectric constant of the chitosan film is enhanced through ionic and interfacial polarization. After corona charge injection, the output voltage of the optimized film can reach 25 times the initial value. Chitosan solution can be used to manufacture both triboelectric and piezoresistance devices, thus assembling the holistic healthcare sensing system.

A Low-Power CuSCN Hydrogen Sensor Operating Reversibly at Room Temperature

Viktoras Kabitakis , Emmanouil Gagaoudakis , Marilena Moschogiannaki , George Kiriakidis , Akmaral Seitkhan , Yuliar Firdaus , Hendrik Faber , Emre Yengel , Kalaivanan Loganathan , George Deligeorgis , Leonidas Tsetseris , Thomas D. Anthopoulos , Vassilios Binas ,

• 2102635
• Version of Record online: 06 November 2021

Low-power hydrogen sensors based on the wide-bandgap p-type semiconductor CuSCN show excellent response to low concentrations of hydrogen at room temperature. The increase in conductivity of CuSCN upon exposure is attributed to the interaction between molecular hydrogen and the noble metal electrode which act as catalysts for hydrogen chemisorption within CuSCN.

Grain Boundary Confinement of Silver Imidazole for Resistive Switching

• 2108598
• Version of Record online: 06 November 2021

A self-reduction and grain boundary confinement strategy has been applied to a silver imidazole resistive random access memory in which the cation movement and filament formation have confined in a crystalline switching medium. Through this facile material engineering strategy, the device exhibits tremendously enhanced performance including low spatial and temporal variation.

Ultra-Sharp Nanowire Arrays Natively Permeate, Record, and Stimulate Intracellular Activity in Neuronal and Cardiac Networks

Ren Liu , Jihwan Lee , Youngbin Tchoe , Deborah Pre , Andrew M. Bourhis , Agnieszka D'Antonio-Chronowska , Gaelle Robin , Sang Heon Lee , Yun Goo Ro , Ritwik Vatsyayan , Karen J. Tonsfeldt , Lorraine A. Hossain , M. Lisa Phipps , Jinkyoung Yoo , John Nogan , Jennifer S. Martinez , Kelly A. Frazer , Anne G. Bang , Shadi A. Dayeh ,

• 2108378
• Version of Record online: 06 November 2021

Innovative scalable, vertical, ultrasharp nanowire arrays are reported that are individually addressable to enable long-term, native recordings of intracellular potentials. Stable amplitudes of intracellular potentials from 3D tissue-like networks of neurons and cardiomyocytes are obtained. Individual electrical addressability is necessary for high-fidelity intracellular electrophysiological recordings. This study paves the way toward predictive, high-throughput, and low-cost electrophysiological drug screening platforms.

Alternating Current Electroluminescent Device Powered by Triboelectric Nanogenerator with Capacitively Driven Circuit Strategy

Xu Liu , Maoyuan Zhang , Ze Yang , Hao Wang , Jiaqi Chen , Zhaozheng Wang , Yijia Lu , Yibao Chen , Linhong Ji , Jia Cheng ,

• 2106411
• Version of Record online: 06 November 2021

A novel and feasible technology for lighting up ACEL via a triboelectric nanogenerator (TENG) is proposed. The most significant innovation is the use of a capacitively driven circuit to greatly increase the output voltage of generator. Compared with direct connection of electroluminescent devices with TENG, both the peak-to-peak voltage and the transferred charges are apparently improved.

Head on Comparison of Self- and Nano-Assemblies of Gamma Peptide Nucleic Acid Amphiphiles

• 2109552
• Version of Record online: 05 November 2021

Herein, gamma peptide nucleic acids (γ  PNA)-based amphiphiles are engineered by conjugating hydrophobic lauric acid domain with γ  PNA containing hydrophilic diethylene glycol scaffolds. γ  PNA self-assembles into large spherical vesicles with >200 nm diameter. In parallel comparison, it is investigated that γ  PNA nano-assemblies, formulated via ethanol injection, form small ellipsoidal vesicles (100 nm) with superior transfection features than γ  PNA self-assemblies.

Organic Semiconductor/Insulator Blends for Elastic Field-Effect Transistors and Sensors

• 2105456
• Version of Record online: 05 November 2021

Blending organic semiconductors with isolating thermoplastic polymers and elastomers improves their environmental stability, device performance, and mechanical properties, opening the door to future flexible and stretchable electronics. This review discusses recent advances in the development of next generation applications of solution processable organic semiconductor/insulator blends in elastic field-effect transistors and sensors.

Synthesis of Carbon Nanotubes by Floating Catalyst Chemical Vapor Deposition and Their Applications

• 2108541
• Version of Record online: 05 November 2021

Floating catalyst chemical vapor deposition (FCCVD) method is widely used to produce high quality carbon nanotubes (CNTs) due to its simple processing, good controllability, and desirable scalability. This review summarizes the state-of-the-art progress in the controlled growth and applications of the CNTs and their macrostructures by FCCVD. The critical challenges and future perspectives are also discussed.

Green Regenerative Hydrogel Wound Dressing Functionalized by Natural Drug-Food Homologous Small Molecule Self-Assembled Nanospheres

Xinyu Sun , Pei Jia , Hui Zhang , Mengna Dong , Jiao Wang , Lihua Li , Tong Bu , Xin Wang , Li Wang , Qingyou Lu , Jihao Wang ,

• 2106572
• Version of Record online: 05 November 2021

Inspired by the drug-food homologous ingredients in cinnamon and red wine, an "all-in-one" chitosan-based hydrogel modified by cinnamaldehyde and tannic acid, integrating antibacterial, antioxidant and anti-inflammatory functions, is designed. The hydrogel can realize in situ gelation on wound sites, completely cover irregular wounds, induce skin tissue remodeling, promote blood vessel repair and hair follicle regeneration, and accelerate wound healing.

Air Sensitivity and Degradation Evolution of Halide Solid State Electrolytes upon Exposure

• 2108805
• Version of Record online: 05 November 2021

Halide solid state electrolytes are sensitive to air, gradually absorb water and, are liquefied to a transparent solution in ambient air. The air sensitivity is closely related to the contact area with air. Upon exposure, Li₃InCl₆ first forms a crystalline hydrate, then partially decomposes to InCl₃ and LiCl, finally In₂O₃ impurities are formed.

Metal Micropatterning by Triboelectric Spark Discharge

Chao Wang , Xiangming Li , Liang Wang , Guifang Liu , Bangbang Nie , Yangfan Qiu , Bin Fan , Chao Yan , Xiaoliang Chen , Hongmiao Tian , Chunhui Wang , Jinyou Shao ,

• 2109265
• Version of Record online: 05 November 2021

A triboelectric nanogenerator is exploited to generate controllable and safe spark discharges under atmosphere, yielding a simple, reliable, and versatile metal micropatterning method for flexible electronics. Micropatterns of diverse metals are fabricated on various flexible substrates, even on ultrathin films without damage. Extended processibility of non-metal conductive materials (carbon nanotubes, graphene, MXene, graphite, carbon fibers and conductive polymer) are also demonstrated.

A Modular Design of Continuously Tunable Full Color Plasmonic Pixels with Broken Rotational Symmetry

Rui Feng , Hao Wang , Yongyin Cao , Yanxia Zhang , Ray J. H. Ng , You Sin Tan , Fangkui Sun , Cheng-Wei Qiu , Joel K. W. Yang , Weiqiang Ding ,

• 2108437
• Version of Record online: 05 November 2021

An all-optical continuously tunable plasmonic pixel scheme is demonstrated via a modular design approach to realize polarization-controlled full color tuning by breaking the intrinsic symmetry of the unit cell layout. These plasmonic pixels can be flexibly customized for various color tuning processes through the appropriate choice of component modules and the elaborate design of module layouts.

Dense Crystalline–Amorphous Interfacial Sites for Enhanced Electrocatalytic Oxygen Evolution

Dan Li , Yanyang Qin , Jia Liu , Hongyang Zhao , Zongjie Sun , Guangbo Chen , De-Yin Wu , Yaqiong Su , Shujiang Ding , Chunhui Xiao ,

• 2107056
• Version of Record online: 05 November 2021

Synchronous crystalline–amorphous (c–a) phase synthetic strategy is used to obtain Ag and NiCoMo oxide (NCMO) heterostructure with dense c–a interfacial sites. The resultant Ag/NCMO electrocatalysts exhibit enhanced oxygen evolution activity than the asynchronously synthesized sample with sparse interfacial sites.

Modular Synthetic Tissues from 3D-Printed Building Blocks

• 2107773
• Version of Record online: 05 November 2021

Synthetic tissues are bioinspired multi-compartment systems that exhibit emergent collective properties. Synthetic tissues have so far been limited to millimeter-sized constructs, with a slow fabrication time and lacking flexible design. Here, the authors introduce a versatile and scalable strategy to assemble modular synthetic tissues from a diverse library of 3D-printed building blocks.

Unveiling the Interplay among End Group, Molecular Packing, Doping Level, and Charge Transport in N-Doped Small-Molecule Organic Semiconductors

Gao-Yang Ge , Jia-Tong Li , Juan-Rong Wang , Miao Xiong , Xue Dong , Zu-Jian Li , Jiu-Long Li , Xiao-Yu Cao , Ting Lei , Jin-Liang Wang ,

• 2108289
• Version of Record online: 05 November 2021

Though TDPP-ThIC shows high electron mobility and good doping level with N-DMBI, the pristine charge transport pathways are easily impeded by these enthetic dopants and then result in a low electrical conductivity, implying that the good charge transport pathway is an important but easily neglected factor for improving electrical conductivity in n-doped small-molecule organic semiconductors.

Exceptionally High Power Factor Ag₂Se/Se/Polypyrrole Composite Films for Flexible Thermoelectric Generators

Yating Li , Qing Lou , Jianmin Yang , Kefeng Cai , Ying Liu , Yiming Lu , Yang Qiu , Yao Lu , Zixing Wang , Miaomiao Wu , Jiaqing He , Shirley Shen ,

• 2106902
• Version of Record online: 05 November 2021

Flexible Ag₂Se/Se/polypyrrole (PPy) composite films on a nylon membrane are fabricated by a facile method. An optimum film shows an exceptionally high power factor of ≈2240 µW m⁻¹ K⁻² at 300 K, mainly because of the synergistic effect between well-crystallized Ag₂Se grains, Se nanoparticles, and PPy. Moreover, a flexible thermoelectric generator assembled with the film shows a high output performance.

Multifunctional Metamaterials for Energy Harvesting and Vibration Control

• 2107896
• Version of Record online: 05 November 2021

A novel multifunctional metamaterial based on triboelectric nanogenerators is designed for energy harvesting and vibration control. The developed multiphyiscs model can be used to analyze and optimize the design of metamaterials. It is anticipated that this new type of multifunctional metamaterials has great prospects for dynamic energy harvesting and vibration reduction in integrated smart structures, wearable/biointegrated electronics, and intelligent robotics.

Peptide Polymer-Doped Cement Acting as an Effective Treatment of MRSA-Infected Chronic Osteomyelitis

Yueming Wu , Yaofa Lin , Zihao Cong , Kang Chen , Ximian Xiao , Xue Wu , Longqiang Liu , Yunrui She , Shiqi Liu , Ruiyi Zhou , Gang Yin , Xiaoyan Shao , Yidong Dai , Haodong Lin , Runhui Liu ,

• 2107942
• Version of Record online: 05 November 2021

The antibacterial peptide polymer doped polymethylmethacrylate pellets (PMMA@polymer) act as an effective treatment of MRSA-infected chronic osteomyelitis, with notable advantages, including antibiotic free, complete release of antibacterial polymer, killing drug-resistant MRSA, low-susceptible to antimicrobial resistance, and stable under heat and enzyme.

Rear Interface Engineering to Suppress Migration of Iodide Ions for Efficient Perovskite Solar Cells with Minimized Hysteresis

Qiu Xiong , Can Wang , Qin Zhou , Luyao Wang , Xiaobing Wang , Longkai Yang , Jiaxin Ding , Chun-chao Chen , Jihuai Wu , Xin Li , Peng Gao ,

• 2107823
• Version of Record online: 05 November 2021

A vacuum deposited NdCl₃ interface layer (NdCl₃-IL) is used at the rear interface to suppress iodide ion migration. Compared to the control device, the NdCl₃-IL-based perovskite solar cells (PvSCs) show improved efficiency and negligible hysteresis, along with enhanced device stability. Combined with designed surface passivation, a PCE over 22% (certified value of 21.68%) can be achieved on large-area (1 cm²) PvSCs.

Biocompatible Materials Enabled by Biobased Production of Pyomelanin Isoforms Using an Engineered Yarrowia lipolytica

• 2109366
• Version of Record online: 05 November 2021

This work metabolically engineers a strain of Yarrowia lipolytica for the rapid production of homogentisic acid that can be in situ or post-hoc converted into pyomelanin. Unique material traits of pyomelanin compounds are explored in applications including electronic materials, metal chelation, and polymer additives. This work establishes pyomelanin as a new functional material complementing ongoing work with melanin and eumelanin.

The Voltage Loss in Tin Halide Perovskite Solar Cells: Origins and Perspectives

• 2108832
• Version of Record online: 05 November 2021

This review starts with the basic physical properties of tin halide perovskites and subsequently presents the origin of open-circuit voltage loss (V _loss) in tin halide perovskite solar cells (TPSCs) in detail. Some recently emerged strategies to suppress V _loss in TPSCs are further summarized, together with a perspective on the development of TPSCs.

Quasi-2D Perovskite Thick Film for X-Ray Detection with Low Detection Limit

• 2109458
• Version of Record online: 05 November 2021

A new strategy to suppress the ion migration is proposed by inserting 2D Ruddlesden–Popper layer into the 3D perovskite film, achieving X-ray detectors with high sensitivity, low detection limit, and stable baseline. The quasi-2D perovskite-based X-ray detector exhibits an extra-low detection limit of 69 nGy_air s⁻¹, which is the lowest among all the polycrystalline or amorphous materials-based detectors.

Unraveling the Rate-Dependent Stability of Metal Anodes and Its Implication in Designing Cycling Protocol

• 2107584
• Version of Record online: 05 November 2021

The high current rate's dual, contradictory roles are unambiguously demonstrated using Zn metal anode as a model system: detrimental kinetics reduces Sand's time and renders deteriorative dendrite formation, while its beneficial thermodynamics enables rapid nucleation rate and improved cycling stability. Based on these findings, a pulse cycling protocol is proposed to stabilize Li/K/Zn metal anodes.

Bioinspired Hierarchical Structures for Contact-Sensible Adhesives

Hong Hu , Duorui Wang , Hongmiao Tian , Qiyao Huang , Chunhui Wang , Xiaoliang Chen , Yuan Gao , Xiangming Li , Xiaoming Chen , Zijian Zheng , Jinyou Shao ,

• 2109076
• Version of Record online: 05 November 2021

Bioinspired contact-sensible adhesive (CSA) is achieved by a hierarchical architecture with mushroom-shaped structures on the top layer and a capacitive force sensor on the bottom as a compliant backing. The CSA not only is sensitive to different types of external loads in normal and lateral directions, but also maintains a strong adhesion on the uneven surface.

Sensing Intra- and Extra-Cellular Ca²⁺ in the Islet of Langerhans

• 2106020
• Version of Record online: 05 November 2021

This review describes the development and current status of Ca²⁺ sensors in tracing intra- and extra-cellular Ca²⁺, with a focus on the relevance of Ca²⁺ signaling to insulin secretion in the islet of Langerhans. Insights into Ca⁺ sensors have a high potential to facilitate their advancement toward improved understanding of the molecular mechanisms underpinning cellular functions.

Controlling Spin Orientation and Metamagnetic Transitions in Anisotropic van der Waals Antiferromagnet CrPS₄ by Hydrostatic Pressure

Yuxuan Peng , Zhongchong Lin , Guang Tian , Jie Yang , Peijie Zhang , Fanggui Wang , Pingfan Gu , Xingyu Liu , Chin-Wei Wang , Maxim Avdeev , Fuyang Liu , Dong Zhou , Rui Han , Peng Shen , Wenyun Yang , Shunquan Liu , Yu Ye , Jinbo Yang ,

• 2106592
• Version of Record online: 05 November 2021

Van der Waals antiferromagnet CrPS₄ undergoes a spin-reorientation transition with magnetic moments realigning from almost parallel to the c axis in the ac plane to along the b axis upon heating. The transition is dramatically suppressed by hydrostatic pressure, offering an effective way to control the Néel vector of antiferromagnets.

Multistep Crystallization Pathways in the Ambient-Temperature Synthesis of a New Alkali-Activated Binder

• 2108126
• Version of Record online: 01 November 2021

Ball milling of calcite and sodium metasilicate leads to "activated" amorphous sodium calcium silicate carbonate (aNaSiCC). Diffusion-controlled crystallization of aNaSiCC in water/acetonitrile mixtures induced crystallization via pirssonite and gaylussite to monohydrocalcite. Alkali activation with NaOH leads to the CSH-like phase, enabling the formation of a concrete binder without the need for high-temperature calcination and emission of CO₂.

Polymer-Mediated Electron Tunneling Towards Solar Water Oxidation

• 2106338
• Version of Record online: 01 November 2021

In these conceptually novel MOs/(TMCs QDs/PSS) _n multilayered photosystems, periodically intercalated insulating PSS layer enables the unexpected electron tunneling over TMC QDs-PSS-MOs photoanodes with electrons photoexcited from TMCs QDs directionally flowing to the MOs matrixes across the intermediate insulating PSS layer, contributing to the tandem charge transport and leading to significantly enhanced net efficiency of photoelectrochemical water oxidation performances.

An Extra-Broadband VIS-NIR Emitting Phosphor toward Multifunctional LED Applications

• 2109618
• Version of Record online: 31 October 2021

The combination of the dual roles of Mn²⁺ in generating red and near-infrared (NIR) emission and the efficient energy transfer from Ce³⁺ to Mn²⁺ in Lu₂BaAl₄SiO₁₂ garnet leads to an extra-broadband visible-NIR emitting phosphor for multifunctional light-emitting diode (LED) applications. This study demonstrates that Mn²⁺ with highly symmetric coordination can efficiently activate broadband NIR phosphors.

Terahertz Detectors Based on Carbon Nanomaterials

• 2107499
• Version of Record online: 31 October 2021

Carbon nanotubes and graphene have unique structures and properties, specifically the unusual thermal, electronic, and photonic effects, which make them highly promising for high performance terahertz detectors. This review covers the major advances in terahertz detectors based on carbon nanotubes and graphene, mainly including the structure characteristic and fundamental principle, as well as the challenges and outlook.

Manipulating the Interlayer Spacing of 3D MXenes with Improved Stability and Zinc-Ion Storage Capability

• 2109524
• Version of Record online: 31 October 2021

Diamine molecules with different molecular sizes are inserted between MXene interlayers as pillars to manipulate interlayer spacing and electrochemical surface area, which further enhance the antioxidant and antistacking stability in terms of charge-transport properties, resulting in promoted Zn²⁺ ion storage capability with excellent rate performance and cycling stability for zinc-ion hybrid supercapacitors.

Graphene-Paper-Based Electrodes on Plastic and Textile Supports as New Platforms for Amperometric Biosensing

Fabrizio Poletti , Alessandra Scidà , Barbara Zanfrognini , Alessandro Kovtun , Vitaliy Parkula , Laura Favaretto , Manuela Melucci , Vincenzo Palermo , Emanuele Treossi , Chiara Zanardi ,

• 2107941
• Version of Record online: 31 October 2021

Conductive graphene paper is employed to fabricate a complete electrode cell on flexible cotton- and plastic-based supports. Two preparation strategies are successfully adopted to obtain reproducible electrodes. Without the need of further modifications, they outperform commercial devices with a state-of-the-art sensitivity to nicotinamide adenine dinucleotide (NADH), a co-factor in enzymatic biosensing, opening new possibilities for wearable smart fabrics.

Modulus-Tailorable, Stretchable, and Biocompatible Carbonene Fiber for Adaptive Neural Electrode

Qian Gong , Yingying Yu , Lixing Kang , Mingchao Zhang , Yingying Zhang , Shanshan Wang , Yutao Niu , Yongyi Zhang , Jiangtao Di , Qingwen Li , Jin Zhang ,

• 2107360
• Version of Record online: 29 October 2021

The hybrid carbonene fibers are applied for matching with the varied biological tissue as implantable electrodes.

Engineering Ir Atomic Configuration for Switching the Pathway of Formic Acid Electrooxidation Reaction

• 2107672
• Version of Record online: 29 October 2021

This study presents a strategy to switch the pathway of formic acid electrooxidation reaction via controlling the Ir atomic configurations. The larger Ir ensembles favor the formation of CO intermediates while the smaller Ir ensembles in ordered Ir₃V intermetallics promote the direct electrooxidation of formic acid into CO₂, which reflects the relationship between CO affinity and Ir atomic configurations.

Global Alignment of Carbon Nanotubes via High Precision Microfluidic Dead-End Filtration

• 2107411
• Version of Record online: 29 October 2021

A custom microfluidic setup capable of precise control and measurement of the volume rate, transmembrane pressure, and resistance is used to probe the mechanism behind the global alignment of carbon nanotubes by dead end filtration. Alignment is shown for both positively and negatively charged carbon nanotubes and on membranes with and without surface texturing.

Flexible, Ultra-Light, and 3D Designed White-Light-Emitting Nanofiber Aerogel

• 2109240
• Version of Record online: 28 October 2021

An ultra-light white-light-emitting nanofiber aerogel is preparing by simply adjusting the mass ratios of blue and orange fluorescent nanofibers. The nanofiber network can effectively inhibit the excessive energy transfer between the donor and acceptor, which can help it finally emit a uniform white light (0.322,0.305). This flexible fluorescent aerogel can further be designed into different 3D shapes and integrated luminous patterns.

π-Extended Bodipy Self-Assembly as Supramolecular Photonic Security Ink and Optical Waveguide

• 2109041
• Version of Record online: 28 October 2021

Described herein is a thermally annealed Bodipy (Bodipy-PE-2) self-assembly and its optical property modulation under various processing conditions. While the annealed Bodipy and its composite with polystyrene exhibit photonic properties, a fluorescent thermochromic ink is obtained when dispersed in PEG. Microcrystals of Bodipy-PE-2 and fibers drawn from the Bodipy-PE-2/polystyrene composites exhibit active and passive waveguiding properties and are hence useful for photonic and security applications.

Plasmon-Induced Pyro-Phototronic Effect Enhancement in Self-Powered UV–Vis Detection with a ZnO/CuO p–n Junction Device

• 2108903
• Version of Record online: 28 October 2021

The performance of a self-powered photodetector based on CuO–ZnO p–n junction is improved significantly by coupling with the pyroelectric effect inspired by localized surface plasmon resonance (LSPR) and photovoltaic effect. Transient thermal power generated by LSPR of Au nanoparticles can raise transient temperature variation once the light turns on, which enhances the detection performance of photodetector for the weak light.

Molecularly Dispersed Cobalt Phthalocyanine Mediates Selective and Durable CO₂ Reduction in a Membrane Flow Cell

• 2107301
• Version of Record online: 28 October 2021

A molecularly dispersed cobalt phthalocyanine catalyst is demonstrated to have better stability than the aggregated one in the industrial-current CO₂ electrolysis. In a membrane flow reactor, the molecularly dispersed catalyst serves selective CO₂-to-CO conversion with long-term durability at 0.25 A for 38.5 h. This research proves the potential of isolated molecular catalysts for industrial applications.

Highly Reversible Zn Metal Anode Stabilized by Dense and Anion-Derived Passivation Layer Obtained from Concentrated Hybrid Aqueous Electrolyte

Bizualem Wakuma Olbasa , Chen-Jui Huang , Fekadu Wubatu Fenta , Shi-Kai Jiang , Soressa Abera Chala , Hsien-Chu Tao , Yosef Nikodimos , Chun-Chieh Wang , Hwo-Shuenn Sheu , Yaw-Wen Yang , Ting-Li Ma , She-Huang Wu , Wei-Nien Su , Hongjie Dai , Bing Joe Hwang ,

• 2103959
• Version of Record online: 28 October 2021

A concentrated hybrid aqueous electrolyte (CHAE) (4 m Zn(CF₃SO₃)₂ + 2 m LiClO₄) is developed to address the dendrite formation and low coulombic efficiency upon Zn deposition/stripping. The Zn growth behavior and the formation mechanism of dense anion-derived passivation layer are unveiled by synchrotron-based in operando imaging and spectroscopy techniques. The CHAE shows excellent cell performance in Zn||LiFePO₄ dual-ion battery.

Self-Adapting Electrochemical Grinding Strategy for Stable Silicon Anode

• 2109887
• Version of Record online: 27 October 2021

A self-adapting electrochemical grinding (ECG) strategy is demonstrated for the preparation of stable silicon anode. By utilizing MgH₂ as the grinding aid, micronsized Si particles are spontaneously grinded to an equilibrium size, which can accommodate the volume change and ensure the stable cycling. As prepared Si anode delivers an excellent reversible specific capacity.

Highly Breathable Chemically-Protective MOF-Fiber Catalysts

• 2108004
• Version of Record online: 27 October 2021

High-performing MOF-textile catalysts are obtained by a combination of seed-mediated and modulator-induced synthetic approaches, showing a substantial enhancement in hydrolytic- and adsorptive removal of hazardous chemicals. In addition, the composites reported here also feature an excellent moisture vapor transport rate, overcoming breathability/detoxification trade-off and ensuring their practical use as a field-deployable chemical-protective system.

Self-Assembled Fullerene Nanostructures: Synthesis and Applications

Arun V. Baskar , Mercy R. Benzigar , Siddulu Naidu Talapaneni , Gurwinder Singh , Ajay S. Karakoti , Jiabao Yi , Ala'a H. Al-Muhtaseb , Katsuhiko Ariga , Pulickel M. Ajayan , Ajayan Vinu ,

• 2106924
• Version of Record online: 27 October 2021

The design strategies and preparation methods including predesigned and postsynthetic strategies for the construction of fullerene-based nanoarchitectures with diverse morphologies, architectures, and dimensionalities are presented. Their performance in high-throughput applications with an in-depth understanding of the structure–property relationships is provided along with future challenges.

An Insight of Skeletal Networks Analysis for Smart Hydrogels

• 2108489
• Version of Record online: 27 October 2021

Hydrogels are 3D cross-linked polymer networks. Insights into the skeletal networks reveal the inherent relationship between the microstructures and functions of smart hydrogels. While guiding the practical applications and advanced trends, fundamental insights also promote the scientific knowledge and profound understanding of advanced materials.

A Perylene-Based Conjugated Polymer Endows Perovskite Solar Cells with 85 °C Durability: The Control of Gas Permeation

• 2108855
• Version of Record online: 27 October 2021

A conjugated copolymer characteristic of alternating N-annulated perylene and 3,4-ethylenedioxythiophene backbones is prepared via direct arylation polycondensation and used for the fabrication of 21.7%-efficiency, 85 °C durable perovskite solar cells. This study demonstrates the importance of developing a hole-transporting material, which is not only morphologically heat-resistant but also can control the thermal decomposition of organic–inorganic hybrid perovskites.

All-in-One Photoacoustic Theranostics Using Multi-Functional Nanoparticles

• 2107624
• Version of Record online: 27 October 2021

In this study, the proposed all-in-one photoacoustic theranostics strategy using the combination of the photoacoustic effect and polymer nanoparticles can provide promoted nanoparticles delivery, significant tumor ablation, and non-invasive, longitudinal postoperative evaluation. It is demonstrated that the pulsed lasers coupled with multi-functional nanoparticles offers a thermal therapy against tumors and the feedback of therapeutic effect in tumor-bearing mice.

Organic Thin-Film Transistors as Cannabinoid Sensors: Effect of Analytes on Phthalocyanine Film Crystallization

• 2107138
• Version of Record online: 27 October 2021

Phthalocyanine (Pc) thin films morphology will rearrange in the presence of Δ⁹-tetrahydrocannabinol and a cannabinoid-sensitive chromophore (Fast Blue BB). Variations in Pc center atoms and peripheral Pc substitutions provide unique Pc–analyte interactions, further tuning analyte induced film recrystallization: a change that can be detected electrically when incorporated into organic thin-film transistors.

Interplay of Structure, Charge-Carrier Localization and Dynamics in Copper-Silver-Bismuth-Halide Semiconductors

• 2108392
• Version of Record online: 27 October 2021

Five semiconductors with compositions Cu_4x (AgBi)_1−x I₄ are investigated via X-ray diffraction, optical, and terahertz spectroscopy. Silver and bismuth are found to be intrinsically linked to the formation of small polarons, while the addition of copper leads to reduced charge-carrier effective masses, enhanced photoluminescence, and improved charge-carrier transport. Further, small polaron formation is shown to cause Langevin-like charge-carrier recombination in silver-bismuth semiconductors.

Monitoring Autophagy with Atg4B Protease-Activated Aggregation-Induced Emission Probe

Yanting Lyu , Xiaoyan Chen , Qi Wang , Qiang Li , Quan Wang , Xiangyu Li , Zhirong Zhu , Chenxu Yan , Xiaolei Zhao , Wei-Hong Zhu ,

• 2108571
• Version of Record online: 27 October 2021

A fundamentally novel peptide-based aggregation-induced emission-active probe QM-GFTN for autophagy detection via indirectly responding autophagy-related enzyme Atg4B is described. This peptide-based probe integrated real-time sensing with high specificity makes a breakthrough in the detection of autophagy process in various autophagic cells, animal tissues, and even human pathological tissues.

4D Pixel Mechanical Metamaterials with Programmable and Reconfigurable Properties

• 2107795
• Version of Record online: 27 October 2021

The tension-torsion coupling metamaterial exhibited torsional deformation while stretching. The mechanical pixel array design, helical microstructure, and 4D printing are introduced into the tension-torsion coupling metamaterial and assembled into the pixel mechanical metamaterial. The tunability, programmability and reconfigurability of the mechanical behaviors of the pixel mechanical metamaterials are verified. The metamaterials showed tremendous potential for information encryptions, soft robots, and buffer devices.

Nanoparticle/Polyelectrolyte Complexes for Biomimetic Constructs

• 2108895
• Version of Record online: 27 October 2021

By using the interfacial complexation of a polyelectrolyte and cellulose nanocrystals to stabilize an aqueous two-phase system, a unique interfacial complex is presented, where the thickness increases with time due to the osmotic stress imbalance between the two phases. Attributable to the growth characteristics of the complex, hierarchical structures can be designed and generated using individual assemblies as building blocks.

Reforming of Soluble Biomass and Plastic Derived Waste Using a Bias-Free Cu₃₀Pd₇₀|Perovskite|Pt Photoelectrochemical Device

• 2109313
• Version of Record online: 27 October 2021

A bias-free Cu₃₀Pd₇₀|perovskite|Pt photoelectrochemical (PEC) device is introduced, which can reform diverse waste streams, including biomass, industrial by-products, and plastic waste into value-added chemicals, and simultaneously generate clean H₂ fuel. The versatile prototype demonstrates the potential of PEC assemblies toward waste valorization, approaching the high product rates, and selectivity required for commercial implementation.

Instant Intracellular Delivery of miRNA via Photothermal Effect Induced on Plasmonic Pyramid Arrays

• 2107999
• Version of Record online: 27 October 2021

In a few µs, an instantaneous high temperature can generate on the plasmonic micro-pyramid-array under short red-laser stimulation, which is high enough to disrupt the cell membranes, and the cooling to 37 °C within ≈150 µs to allow the self-healing of cell membranes. Instant and efficient intracellular delivery of miRNA against esophageal cancer is demonstrated.

High-Performance Ultrathin Molecular Rectifying Diodes Based on Organic/Inorganic Interface Engineering

• 2108478
• Version of Record online: 27 October 2021

The successful engineering of organic/inorganic hybrid nanodevices requires well-established tools to bottom-up manipulate functional interfaces. Here the advantage is taken of the Schottky diode working principle to build up ultrathin (≈10 nm) molecular rectifying diodes displaying cutting-edge characteristics, such as a 10 MHz operation and a 4-magnitude-order rectification ratio. Such features raise the bar for the next-generation ultrathin organic/inorganic devices.

Electroluminescent Solar Cells Based on CsPbI₃ Perovskite Quantum Dots

Yao Wang , Chenghao Duan , Xuliang Zhang , Jianguo Sun , Xufeng Ling , Junwei Shi , Long Hu , Zizhen Zhou , Xianxin Wu , Wei Han , Xinfeng Liu , Claudio Cazorla , Dewei Chu , Shujuan Huang , Tom Wu , Jianyu Yuan , Wanli Ma ,

• 2108615
• Version of Record online: 27 October 2021

In this study it is reported an electroluminescent solar cell using CsPbI₃ quantum dots (QDs) via solid-state-ligand exchange process using organic ligand triphenyl phosphite; the device achieves a champion efficiency of 15.21%, and an overall electric power to light conversion efficiency of 3.80% in red light-emitting diode function, a record value for QD photovoltaics.

Biopolymer-Templated Deposition of Ordered and Polymorph Titanium Dioxide Thin Films for Improved Surface-Enhanced Raman Scattering Sensitivity

Qing Chen , Marie Betker , Constantin Harder , Calvin J. Brett , Matthias Schwartzkopf , Nils M. Ulrich , Maria E. Toimil-Molares , Christina Trautmann , L. Daniel Söderberg , Christian L. Weindl , Volker Körstgens , Peter Müller-Buschbaum , Mingming Ma , Stephan V. Roth ,

• 2108556
• Version of Record online: 27 October 2021

The morphology and crystallinity of biotemplated titanium dioxide/cellulose nanofibril (TiO₂/CNF) thin films are studied by X-ray scattering techniques. The TiO₂ layer achieves a desired crystalline state while preserving the morphology of the CNF template. The resulting highly ordered and polymorphous TiO₂/CNF thin films display an excellent surface-enhanced Raman scattering (SERS) performance compared to semiconductor metal oxide nanomaterial-based SERS substrates.

Polymer-Grafted Nanoparticles as Single-Component, High Filler Content Composites via Simple Transformative Aging

• 2107139
• Version of Record online: 27 October 2021

The use of polymer-grafted nanoparticles as a single-component composite provides control over material composition, structure, and properties. However, maximizing filler loading without compromising mechanical integrity or processability remains a challenge. Herein, the thermal cross-linking of ester groups in soft methacrylic polymers is developed as generalizable method for synthesizing rigid, highly filled nanocomposites that can be easily formed into macroscopic structures.

Synergetic Co-Modulation of Crystallization and Co-Passivation of Defects for FAPbI₃ Perovskite Solar Cells

Minhuan Wang , Yanfeng Yin , Wanxian Cai , Jing Liu , Yaling Han , Yulin Feng , Qingshun Dong , Yudi Wang , Jiming Bian , Yantao Shi ,

• 2108567
• Version of Record online: 27 October 2021

The authors report a novel strategy co-modulation of crystallization and co-passivation of defects for FAPbI₃ perovskite solar cell, which gives a high PCE of 21.6% for the modified PSC (only 16.5% for the control device).

Modulation and Modeling of Three-Dimensional Nanowire Assemblies Targeting Gas Sensors with High Response and Reliability

Hyeuk Jin Han , Gyu Rac Lee , Yujin Han , Hanhwi Jang , Eugene N. Cho , Sunho Kim , Chang Sub Kim , Soonmin Yim , Jae Won Jeong , Jong Min Kim , Seunghee Yu , Harry L. Tuller , Yeon Sik Jung ,

• 2108891
• Version of Record online: 27 October 2021

Simple downsizing of nano-building blocks and their assembly typically exhibits a large device-to-device variation in gas sensor performance due to unpredictable electrical conduction pathways. This study demonstrates systemically controlled 3D nanostructures can achieve both high sensing response and reproducibility. Combining electrical characterization with equivalent circuit modeling provides important insights into the electrical conduction in 3D assemblies and their gas-sensing mechanism.

Anion-Rectifying Polymeric Single Lithium-Ion Conductors

Seok-Kyu Cho , Kyeong-Seok Oh , Jong Chan Shin , Ji Eun Lee , Kyung Min Lee , Junbeom Cho , Won Bo Lee , Sang Kyu Kwak , Minjae Lee , Sang-Young Lee ,

• 2107753
• Version of Record online: 27 October 2021

A new class of quasi-solid-state single-ion conductor (SIC) based on an anion-rectifying semi-interpenetrating polymer network (semi-IPN) with reticulated ion nanochannels is presented. The semi-IPN SIC consists of bicontinuous nanophase-separated linear cationic polyurethane and ultraviolet-crosslinked ethoxylated trimethylolpropane triacrylate polymers. The semi-IPN SIC, driven by its accelerated Li⁺ transport that outperforms those of commercial carbonate liquid electrolytes, improves electrochemical performance of Li-metal cells.

Recent Advances in Complex Hollow Electrocatalysts for Water Splitting

• 2108681
• Version of Record online: 27 October 2021

Complex hollow nanostructures have attracted considerable interest in energy applications. In addition, the available component regulation could endow them with a further improved intrinsic activity. Herein, the recent progress in the design of micro-/nanostructured hollow structures for water splitting is discussed according to the regulatory strategies of geometrical structure control and composition control. Some emergent opportunities and perspectives on the future research trends of hollow structures are also proposed.

Semiconductor Nanowire-Based Cellular and Subcellular Interfaces

• 2107997
• Version of Record online: 27 October 2021

The highly intricate structures of biological systems make the precise probing of biological dynamics at the cellular-level particularly difficult. As an advanced toolset capable of exploring diverse biointerfaces, high-aspect-ratio nanowires stand out with their unique mechanical, optical, and electrical properties. Semiconductor nanowires, in particular, can interrogate diverse electrophysiological activities through the nanowire-based signal transduction interfaces.

Nature Sunflower Stalk Pith with Zwitterionic Hydrogel Coating for Highly Efficient and Sustainable Solar Evaporation

• 2108135
• Version of Record online: 27 October 2021

A low-density, low thermal conductivity, environment friendly, inexpensive, efficient, and stable solar steam device is developed using sunflower pith with a zwitterionic hydrogel coating. The rapid water transport property, salt-resistant and anti-biofouling performance are due to synergistic effects of the multi-curvature gradient porous structure and zwitterionic hydrogels. This natural biomass evaporator could obtain clean water from a variety of sewage.

Soft X-ray Detectors Based on SnS Nanosheets for the Water Window Region

Babar Shabbir , Jingying Liu , Vaishnavi Krishnamurthi , R. A. W. Ayyubi , Kevin Tran , Sherif Abdulkader Tawfik , M. Mosarof Hossain , Hareem Khan , Yingjie Wu , Bannur Nanjunda Shivananju , Rizwan Ur Rehman Sagar , Asif Mahmood , Adnan Younis , Md Hemayet Uddin , Syed A. Bukhari , Sumeet Walia , Yongxiang Li , Michelle J.S. Spencer , Nasir Mahmood , Jacek J. Jasieniak ,

• 2105038
• Version of Record online: 27 October 2021

A direct soft X-ray detector based on ultrathin tin mono-sulfide (SnS) nanosheets suitable for the water region is introduced. These X-ray detectors exhibit excellent sensitivity values on the order of 10⁴ μCGy⁻¹ cm⁻² at E < 10 keV and are found to be sensitive to the number of stacked SnS layers, with thicker SnS nanosheet assemblies yielding higher values.

In-Liquid Plasma for Surface Engineering of Cu Electrodes with Incorporated SiO₂ Nanoparticles: From Micro to Nano

• 2107058
• Version of Record online: 27 October 2021

Plasma electrolysis is proposed for surface engineering of copper electrodes. Silica nanoparticles are crucial for fabricating 3D coral-like microstructures, whose growth and the resulting EASA can be actively fine-tuned. The plasma-treated copper surfaces are composed of a thin outer shell of copper(II) oxide and a core of copper(I) oxide. Electrochemical treatment enables the structural transformation from microstructures to nanosphere assemblies.

Bioinspired Integration of Naturally Occurring Molecules towards Universal and Smart Antibacterial Coatings

• 2108749
• Version of Record online: 23 October 2021

A facile and robust preparation strategy towards universal and smart antibacterial coatings is established via a one-pot integration of two types of naturally occurring building blocks, aminoglycosides and protocatechualdehyde in the presence of plant enzyme horseradish peroxidase. Several promising features including dynamic (i.e., pH-responsive) properties, tunable antibiotics release behaviors, and efficient antibacterial activities are demonstrated.

Design of less than 1 nm Scale Spaces on SnO₂ Nanoparticles for High-Performance Electrochemical CO₂ Reduction

Mun Kyoung Kim , Hojeong Lee , Jong Ho Won , Woohyeong Sim , Shin Joon Kang , Hansaem Choi , Monika Sharma , Hyung-Suk Oh , Stefan Ringe , Youngkook Kwon , Hyung Mo Jeong ,

• 2107349
• Version of Record online: 23 October 2021

The space-confinement approach to Sn-based nanoparticles enhances the activity of Sn and its selectivity to formic acid. When the spacing between the active surfaces of Sn reaches <1 nm, an order of magnitude increase in the current density and the product selectivity is observed for the electrochemical reduction of CO₂ at a given applied potential.

Halide Perovskites: Advanced Photovoltaic Materials Empowered by a Unique Bonding Mechanism

• 2110166
• Version of Record online: 23 October 2021

Halide perovskites (ABX₃) are among the most promising photovoltaic (PV) materials, characterized by large optical absorption and high charge carrier mobility. These properties are attributed to the BX bond, which differs significantly from ionic, metallic, or covalent bonds. Instead, one p-electron is shared between adjacent atoms. This perspective explains favorable PV properties and provides a map to design them.

Roadmap on Sustainable Mixed Ionic-Electronic Conducting Membranes

Guoxing Chen , Armin Feldhoff , Anke Weidenkaff , Claudia Li , Shaomin Liu , Xuefeng Zhu , Jaka Sunarso , Kevin Huang , Xiao-Yu Wu , Ahmed F. Ghoniem , Weishen Yang , Jian Xue , Haihui Wang , Zongping Shao , Jack H. Duffy , Kyle S. Brinkman , Xiaoyao Tan , Yan Zhang , Heqing Jiang , Rémi Costa , Kaspar Andreas Friedrich , Ralf Kriegel ,

• 2105702
• Version of Record online: 23 October 2021

The roadmap involving multidisciplinary research fields, presented by various global experts in their fields, is intended to give an overview on the status and breakthroughs of this evolving and growing interdisciplinary field and provide insights into the challenges driven by the research needs and opportunities in the diverse and rich field of using mixed ionic-electronic conducting membranes.

Erythrocyte Membrane Camouflaged Metal–Organic Framework Nanodrugs for Remodeled Tumor Microenvironment and Enhanced Tumor Chemotherapy

Chaoqiang Qiao , Xiaofei Wang , Guohuan Liu , Zuo Yang , Qian Jia , Lexuan Wang , Ruili Zhang , Yuqiong Xia , Zhongliang Wang , Yang Yang ,

• 2107791
• Version of Record online: 23 October 2021

The tumor-environment-modulating nanomedicine (ZIF-8-DOX-LY-RM), consisting of a doxorubicin (DOX)/LY364947-loaded metal–organic framework (MOF) core and red blood cell membrane shell, exhibits highly effective delivery of drug to tumor tissue. The nanomedicine reduces extracellular matrix and alters tumor hypoxia, consequently, improves tumor penetration, and overcomes chemoresistance. This study offers a potential therapeutic nanoplatform for improving tumor chemotherapy.

Thermal Properties of Nanocrystalline Silicon Nanobeams

Jeremie Maire , Emigdio Chávez-Ángel , Guillermo Arregui , Martin F. Colombano , Nestor E. Capuj , Amadeu Griol , Alejandro Martínez , Daniel Navarro-Urrios , Jouni Ahopelto , Clivia M. Sotomayor-Torres ,

• 2105767
• Version of Record online: 23 October 2021

The performance of optomechanical nanostructures, like many other devices, is impacted by nanoscale thermal energy transfer. Competing contributions of the nanoscale grains and the fabricated nanoscale geometry to the decrease in thermal conductivity of silicon-based nanostructures lead to values well below 10 W m^–1 K^–1. A novel measurement technique is introduced to measure the thermal properties of optomechanical nanostructures in working conditions.

Selective Effects of the Host Matrix in Hydrogenated InGaAsN Alloys: Toward an Integrated Matrix/Defect Engineering Paradigm

Francesco Filippone , Saeed Younis , Giuseppe Mattioli , Marco Felici , Elena Blundo , Antonio Polimeni , Giorgio Pettinari , Damiano Giubertoni , Eduard Sterzer , Kerstin Volz , Dan Fekete , Eli Kapon , Aldo Amore Bonapasta ,

• 2108862
• Version of Record online: 22 October 2021

A theoretical model explains some experimental results in hydrogenated InGaAsN alloys by revealing a novel phenomenon. The stiffness of the N local environment governs the preference for which hydrogen structures form, thus inducing an important limitation on the actual defects production as the alloy composition is changed. This leads to a new strategy for tuning defect structures with desired properties.

All-Inorganic Perovskite Polymer–Ceramics for Flexible and Refreshable X-Ray Imaging

Weiqing Chen , Min Zhou , Yang Liu , Xue Yu , Chaojie Pi , Ze Yang , Hao Zhang , Zhichao Liu , Ting Wang , Jianbei Qiu , Siu Fung Yu , Yang (Michael) Yang , Xuhui Xu ,

• 2107424
• Version of Record online: 22 October 2021

X-ray imaging achieves for high spatial resolution and long operation lifetime. Herein, a perovskite "polymer–ceramics" scintillator, where the halide perovskite nanocrystals are precipitated in situ from a pre-solidified polymer matrix, is designed to construct flexible and refreshable X-ray images, especially for non-flat targets.

In vitro Evaluation of the Therapeutic Effects of Dual-Drug Loaded Spermine-Acetalated Dextran Nanoparticles Coated with Tannic Acid for Cardiac Applications

Giulia Torrieri , Mónica P. A. Ferreira , Mohammad-Ali Shahbazi , Virpi Talman , S. Tuuli Karhu , Lotta Pohjolainen , Cláudia Carvalho , João F. Pinto , Jouni Hirvonen , Heikki Ruskoaho , Vimalkumar Balasubramanian , Hélder A. Santos ,

• 2109032
• Version of Record online: 22 October 2021

Delivery of compounds for the stimulation of cardiomyocytes proliferation shows promising therapeutic effects in vitro. A nanoparticulate system is developed combining the antifibrotic properties of the surface coating, together with the induction of cardiomyocytes proliferation, promoted by the drug payloads. The tannic acid coating also provides heart targeting properties.

Interface Engineering in 1D ZnO-Based Heterostructures for Photoelectrical Devices

• 2106887
• Version of Record online: 22 October 2021

Although 1D ZnO-based heterostructures and their applications in photoelectrical devices are achieved in the past decades, how the interface engineering affects the performance of 1D ZnO-based heterostructures needs to be further clarified. Here, a focused review on interface engineering in 1D ZnO-based heterostructures is provided to yield prospectives for future applications in photoelectrical devices.

Novel Narrow Bandgap Terpolymer Donors Enables Record Performance for Semitransparent Organic Solar Cells Based on All-Narrow Bandgap Semiconductors

Xuexiang Huang , Lifu Zhang , Yujun Cheng , Jiyeon Oh , Chunquan Li , Bin Huang , Lin Zhao , Jiawei Deng , Youhui Zhang , Zuoji Liu , Feiyan Wu , Xiaotian Hu , Changduk Yang , Lie Chen , Yiwang Chen ,

• 2108634
• Version of Record online: 22 October 2021

Terpolymer: Y6 system promotes significant breakthroughs in photovoltaic performance for both traditional opaque organic solar cells and semitransparent organic solar cells (ST-OSCs) based on all narrow bandgap (all-NBG) semiconductors. The terpolymer PCE10-BDT2F-0.8:Y6-based ST-OSCs achieve power conversion efficiencies (PCEs) of 12.00% and 10.85% with average visible transmittance (AVT) of 30.98% and 41.08%, respectively.

Inkjet Printed Disposable High-Rate On-Paper Microsupercapacitors

Zheng Li , Virginia Ruiz , Viktoriia Mishukova , Qiansu Wan , Haomin Liu , Han Xue , Ying Gao , Gaolong Cao , Yuanyuan Li , Xiaodong Zhuang , Jonas Weissenrieder , Shi Cheng , Jiantong Li ,

• 2108773
• Version of Record online: 22 October 2021

It is found that graphene quantum dots and electrochemically exfoliated graphene can synergistically stabilize PEDOT:PSS to form highly reliable sintering-free inks for scalable inkjet printing of thick conductive patterns on paper substrates. The printed "totally metal-free" on-paper microsupercapacitor devices and arrays attain large areal capacitance at high scan rates, and are promising for compact energy storage components in disposable electronics.

Rubik-Cube-Based Self-Powered Sensors and System: An Approach toward Smart Toys

• 2107099
• Version of Record online: 22 October 2021

The second-order Rubik cube-based triboelectric nanogenerator (SRC-TENG) can not only light up dozens of LEDs but also drive low-power portable electronic devices, and can be used as a sensor in the smart home area and track the movement trajectory of the Rubik cube in the process of recovery.

Reconfigurable Carbon Nanotube Barristor

Gaotian Lu , Yang Wei , Xuanzhang Li , Ruixuan Peng , Guangqi Zhang , Zhen Mei , Liang Liang , Kai Liu , Qunqing Li , Shoushan Fan , Yuegang Zhang ,

• 2107454
• Version of Record online: 22 October 2021

By combining a Schottky barrier carbon nanotube (CNT) transistor with interfacial charges, a reconfigurable CNT barristor is developed. In contrast to traditional diodes, the barristor exhibits unique rectifying behaviors by switching probes. Moreover, the rectifying directions can be reconfigured from forward to backward by gate voltages. A gate-tunable half-wave rectifier is further fabricated based on the CNT barristor.

Bifunctional Catalytic Effect of CoSe₂ for Lithium-Sulfur Batteries: Single Doping versus Dual Doping

• 2107838
• Version of Record online: 22 October 2021

A bifunctional Ni/Zn dual-doped CoSe₂ is designed and used as a catalyst for lithium-sulfur batteries, to improve the catalytic effect of CoSe₂. Ni/Zn dual-doped CoSe₂ exhibits excellent catalytic effect due to bifunctional roles in catalyzing conversion reaction of lithium polysulfides (LiPSs), precipitation, and decomposition of Li₂S, by combining the function of Ni and Zn.

Achieving Super Broadband Electromagnetic Absorption by Optimizing Impedance Match of rGO Sponge Metamaterials

• 2107508
• Version of Record online: 22 October 2021

The electromagnetic absorption metamaterials based on reduced graphene oxide (rGO) sponge with different unit shapes (sphere, cubic, hexagonal prism, and frustum pyramid) are prepared. The relationship between the unit shape and electromagnetic absorption performance is explored by experiments and simulation. The frustum pyramid metamaterial exhibits ultrabroad band electromagnetic absorption, which is contributed to the excellent impedance matching.

Photovoltage-Competing Dynamics in Photoelectrochemical Devices: Achieving Self-Powered Spectrally Distinctive Photodetection

Xin Liu , Danhao Wang , Yang Kang , Shi Fang , Huabin Yu , Haochen Zhang , Muhammad Hunain Memon , Jr-Hau He , Boon S. Ooi , Haiding Sun , Shibing Long ,

• 2104515
• Version of Record online: 22 October 2021

A new architecture of photoelectrochemical devices composed of semiconductor nanowires demonstrates photocurrent polarity-switchable characteristics based on the photovoltage-competing dynamics across two photoelectrodes, aiming for spectrally distinctive photodetection. Importantly, a remarkable boost of photocurrent and responsivity can be achieved after rational surface modification of the nanowire structures, offering an unprecedented opportunity to construct multifunctional photosensing systems of the future.

What Drives the Kinetics and Doping Level in the Electrochemical Reactions of PEDOT:PSS?

• 2105821
• Version of Record online: 22 October 2021

It is found that the doping level in electrochemical reactions of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) depends on thermodynamical equilibria that are ruled by the Gibbs free energy of the reactions. While the dedoping reaction is driven by enthalpy, the redoping is dominated by entropic effects. Both reaction rates of dedoping and redoping are limited by the conversion of polarons.

Low-Coordinated CoNC on Oxygenated Graphene for Efficient Electrocatalytic H₂O₂ Production

Haisheng Gong , Zengxi Wei , Zhichao Gong , Jingjing Liu , Gonglan Ye , Minmin Yan , Juncai Dong , Christopher Allen , Jianbin Liu , Kang Huang , Rui Liu , Guanchao He , Shuangliang Zhao , Huilong Fei ,

• 2106886
• Version of Record online: 21 October 2021

A low-coordinated CoN₂ C single-atom catalyst containing abundant COC epoxide groups is developed via a transient microwave thermal shock with the merits of optimized electronic structure and exceptional performance for H₂O₂ production.

Emergent Enhanced Electrocaloric Effect within Wide Temperature Span in Laminated Composite Ceramics

Ruowei Yin , Junjie Li , Xiaopo Su , Shiqiang Qin , Chengye Yu , Yuxuan Hou , Chuanbao Liu , Yanjing Su , Lijie Qiao , Turab Lookman , Yang Bai ,

• 2108182
• Version of Record online: 20 October 2021

A multilayer structure with three compositions at the tricritical point, and with transition temperatures that increase sequentially is proposed. The significant interaction between adjacent layers dynamically utilizes the larger thermal response of the adjacent temperature domain by a synergistic phase transition, resulting in a large EC response (ΔT _max = 0.63 K) and wide temperature span (57 °C).

Importance of High-Electron Mobility in Polymer Acceptors for Efficient All-Polymer Solar Cells: Combined Engineering of Backbone Building Unit and Regioregularity

Soodeok Seo , Cheng Sun , Jin-Woo Lee , Seungjin Lee , Dongchan Lee , Cheng Wang , Tan Ngoc-Lan Phan , Geon-U Kim , Shinuk Cho , Yun-Hi Kim , Bumjoon J. Kim ,

• 2108508
• Version of Record online: 20 October 2021

A series of small molecule acceptor-polymerized acceptors (P _As) with 2D control of regioregularity and ii) donating units are developed to investigate a direct relationship between the electron mobility of P _A and the performance of all-polymer solar cells (all-PSCs). The Y5-Se-In-based all-PSC showed the most well-developed crystalline properties, the electron mobility and, thus, the best efficiency of 13.4%. The authors report, for the first time, the opposite effects of regioisomers on the chain conformation, electron mobility of P _As, and the all-PSC performance depending on the backbone building unit.

Simple Nonfused-Ring Electron Acceptors with Noncovalently Conformational Locks for Low-Cost and High-Performance Organic Solar Cells Enabled by End-Group Engineering

Congqi Li , Xin Zhang , Na Yu , Xiaobin Gu , Linqing Qin , Yanan Wei , Xingzheng Liu , Jianqi Zhang , Zhixiang Wei , Zheng Tang , Qinqin Shi , Hui Huang ,

• 2108861
• Version of Record online: 20 October 2021

Nonfused-ring electron acceptors (NREAs) have attracted much attention due to several advantages such as simple synthetic routes, high yields, and low costs. Herein, a series of simple NREAs with S···O noncovalently conformational locks (NoCLs) are constructed. Combining the strategies of NoCLs and end-group engineering, a record PCE of 13.76% for NREAs-II based devices was achieved.

An Ion Channel-Induced Self-Powered Flexible Pressure Sensor Based on Potentiometric Transduction Mechanism

• 2108856
• Version of Record online: 20 October 2021

AN all-solid-state pressure sensor (reduced graphene oxide/graphene oxide/polyvinyl alcohol nanofibers/MXene), which yields an open-circuit voltage/short-circuit current density of 0.58 V/3.2 µA cm^-2, is designed based on a mechanical potentiometric transduction mechanism, by converting mechanical stimulation into programmable stable voltage and current signals. The self-powered sensor has excellent pressure sensing performance that could considerably promote the development of potential-mechanical conduction mechanism.

A Fast Proton-Induced Pseudocapacitive Supercapacitor with High Energy and Power Density

• 2107720
• Version of Record online: 20 October 2021

A multi-metallic Prussian blue analog material (Cu_0.82Co_0.18HCF) is developed to realize extremely high-rate and long-cycle performance. The enhanced electronic structure and magnetic state provide favorable transport channel for faster proton migration and reversible proton insertion. The as-constructed pseudocapacitive proton supercapacitor delivers an energy density of 22 Wh kg⁻¹ even under a power density as high as 26 kW kg⁻¹.

Semiconductor Nanowire Arrays for High-Performance Miniaturized Chemical Sensing

Shiyu Wei , Zhe Li , Alishba John , Buddini I. Karawdeniya , Ziyuan Li , Fanlu Zhang , Kaushal Vora , Hark Hoe Tan , Chennupati Jagadish , Krishnan Murugappan , Antonio Tricoli , Lan Fu ,

• 2107596
• Version of Record online: 20 October 2021

A novel miniaturized chemiresistive nitrogen dioxide sensor based on indium phosphide nanowire array fabricated by top-down etching approach has been demonstrated, achieving room temperature operation with high sensitivity, selectivity, and excellent stability. Kinetic analysis and electrical simulation are performed revealing a strong nanowire geometry (i.e., diameter and pitch size) correlated sensing mechanism.

Surface Reconstruction for Stable Monolithic All-Inorganic Perovskite/Organic Tandem Solar Cells with over 21% Efficiency

Weijie Chen , Dong Li , Xu Chen , Haiyang Chen , Shuo Liu , Haidi Yang , Xinqi Li , Yunxiu Shen , Xuemei Ou , Yang (Michael) Yang , Lin Jiang , Yaowen Li , Yongfang Li ,

• 2109321
• Version of Record online: 20 October 2021

A surface reconstruction strategy is proposed to optimize the surface defect states and crystallization dynamics in an all-inorganic perovskite/organic two-terminal tandem solar cell, leading to efficient hole transport and charge recombination in the interconnecting layer. Finally, a power conversion efficiency of 21.04% and robust operational stability are obtained.

Balance Effect: A Universal Strategy for Transition Metal Carbides to Enhance Hydrogen Evolution

• 2108167
• Version of Record online: 20 October 2021

Transition metal carbides (TMCs) are integrated with nitrogen-doped graphene (NG). These TMC@NG electrocatalysts anchored on the carbon nanotubes balance adsorption and desorption of hydrogen, enhance the kinetics of hydrogen evolution reaction (HER), and exhibit superior HER activity and long-term stability in both acidic and alkaline media. This universal strategy provides a novel route to design and synthesize efficient HER electrocatalysts.

Intrinsically Stretchable and Stable Ultra-Deep-Blue Fluorene-Based Polymer with a High Emission Efficiency of ≈90% for Polymer Light-Emitting Devices with a CIE _y  = 0.06

Mingjian Ni , Xiang An , Lubing Bai , Kai Wang , Jiangli Cai , Shengjie Wang , Liangliang He , Man Xu , Heyuan Liu , Jinyi Lin , Xuehua Ding , Chengrong Yin , Wei Huang ,

• 2106564
• Version of Record online: 20 October 2021

Intrinsically stretchable and ultrastable deep-blue fluorene-based block polymers are obtained via a π-conjugated-interrupted strategy, which present deep-blue emission with emission efficiency of ≈90%, associated with the single-chromophore behavior. Beneficial of interchain entanglement, P8 film had a uniform morphology under a tensile rate of ≈15%. Finally, preliminary P8-based PLEDs also present a stable ultra-deep-blue emission with a CIE of (0.15, 0.06).

Versatile Titanates: Classification, Property, Preparation, and Sustainable Energy Catalysis

• 2108350
• Version of Record online: 20 October 2021

Titanates can show the features of favorable band structure and strong piezo/pyro/ferroelectricity, which make them promising for multiform energy conversion and catalysis. The advances in H₂ evolution and CO₂ reduction for titanates as cocatalysts, photocatalysts, piezocatalysts, and pyrocatalysts are elaborately summarized, which offer a guide to harvesting various sustainable energy sources for renewable fuel production.

Breathable and Flexible Dual-Sided Nonwovens with Adjustable Infrared Optical Performances for Smart Textile

• 2108808
• Version of Record online: 20 October 2021

A breathable and flexible dual-sided nonwoven composed of polyimide nanofiber and silver nanowires possesses good electrical conductivity and high infrared reflection performance. A personal thermal management device is constructed of two layers of dual-sided nonwoven containing different amounts of silver nanowires, demonstrating prominent human body warming performance by combining active Joule heating and passive warming via reduced radiative losses.

Kill&Repel Coatings: The Marriage of Antifouling and Bactericidal Properties to Mitigate and Treat Wound Infections

Manuela Garay-Sarmiento , Lena Witzdam , Mariia Vorobii , Christian Simons , Niklas Herrmann , Andres de los Santos Pereira , Elisabeth Heine , Islam El-Awaad , Rudolf Lütticken , Felix Jakob , Ulrich Schwaneberg , Cesar Rodriguez-Emmenegger ,

• 2106656
• Version of Record online: 20 October 2021

The bioinspired Kill&Repel coatings are formed by the self-assembly of biohybrid molecules that generate brushes functionalized with endolysins, combining antifouling properties with selective bactericidal activity. The synergistic action of both building blocks results in an excellent barrier to molecular and cellular fouling and boosts the activity of the endolysin, enabling the coatings to resolve a simulated infection from multiresistant bacteria.

Position-Controlled Fabrication of Vertically Aligned Mo/MoS₂ Core–Shell Nanopillar Arrays

• 2107880
• Version of Record online: 20 October 2021

A novel strategy to fabricate position-controlled vertically-aligned Mo/MoS₂ core–shell nanopillar arrays is reported. This configuration offers an alternative to the standard platelet-like one, while achieving a precise control on the size-, morphology-, and position at the wafer scale. This opens new directions for optoelectronic applications such as the precise spatial localization of the second order nonlinear optical response.

Scalable Submicron Channel Fabrication by Suspended Nanofiber Lithography for Short-Channel Field-Effect Transistors

• 2109254
• Version of Record online: 20 October 2021

A scalable and economical nanofabrication technique is developed by combining the near-field electrohydrodynamic printing of suspended nanofibers with photolithographic processes, and is further exploited for studying the performances of short-channel field-effect transistors based on carbon nanotubes or MoS₂. This approach is promising to be applied on a variety of semiconductors for the highly integrated fabrication of submicron short-channel device arrays.

Ultrasonically Propelled Micro- and Nanorobots

• 2102265
• Version of Record online: 20 October 2021

Ultrasonically propelled micro/nanorobots provide numerous advantageous. Here, the current progress of ultrasonically propelled micro/nanorobots upon their propulsion mechanism, detailed description of their fabrication methods, hybrid motion in combination with another propulsion mechanism as well as their potential application in biomedical, environmental, and other fields is discussed.

The Hidden Potential of Polysilsesquioxane for High-k: Analysis of the Origin of its Dielectric Nature and Practical Low-Voltage-Operating Applications beyond the Unit Device

Heqing Ye , Hyeok-jin Kwon , Su Cheol Shin , Hwi-young Lee , Young Ho Park , Xiaowu Tang , Ruxian Wang , Kanghyuck Lee , Jisu Hong , Zhijun Li , Wonkyo Jeong , Jiyeong Kim , Chan Eon Park , Jihoon Lee , Tae Kyu An , Insik In , Se Hyun Kim ,

• 2104030
• Version of Record online: 19 October 2021

The introduction of the dipolar side chain in polysilsesquioxane based dielectrics yield high-k properties. This strategy is successfully applied as gate dielectrics for low-voltage operating organic electronics from unit to integrated devices. Besides, the solution-processability of these materials makes it possible to facile fabrication of dielectric layers through printing methods, suggesting the possibility of efficient electronic device manufacturing.

Super-Stable Mineralization of Ni²⁺ Ions from Wastewater using CaFe Layered Double Hydroxide

Haoyuan Chi , Jikang Wang , Huijuan Wang , Shaoquan Li , Mufei Yang , Sha Bai , Changjuan Li , Xiaoliang Sun , Yufei Zhao , Yu-Fei Song ,

• 2106645
• Version of Record online: 19 October 2021

The CaFe-layered double hydroxide (CaFe-LDH) exhibits a super-stable mineralization efficiency for removing Ni²⁺ ions. The isomorphous substitution of Ca²⁺ by Ni²⁺ in the laminate of LDH dominated the mineralization process and the CaFe-LDH is transformed to the corresponding NiCaFe-LDH accordingly. The formed NiCaFe-LDH shows improved electrocatalytic oxygen evolution reaction and photocatalytic CO₂ reduction activities.

Implanting a Fire-Extinguishing Alkyl in Sodium Metal Battery Electrolytes via a Functional Molecule

• 2109378
• Version of Record online: 19 October 2021

An amphiphilicity-based strategy is proposed to implanting a fire-extinguishant into an organic liquid electrolyte toward safe sodium metal batteries. Via the amphiphilicity of fluoroether, a high-fluoride alkyl fire-extinguishant is uniformly implanted into carbonate-based electrolyte for safe sodium metal batteries (SMBs). Furthermore, an inorganic-based interphase induced in situ enables a dendrite-free and highly stable sodium metal anode.

PtCo@PtSn Heterojunction with High Stability/Activity for pH-Universal H₂ Evolution

• 2107597
• Version of Record online: 17 October 2021

The PtCo@PtSn heterojunction for hydrogen evolution reaction at pH-universal condition is theoretically and experimentally studied. Theoretical calculations reveal that the electronic structures are redistributed at the interface between PtCo and PtSn, which optimizes the H adsorption energy and water dissociation energy, thus obtaining outstanding hydrogen evolution reaction.

Light-Addressable Nanocomposite Hydrogels Allow Plasmonic Actuation and In Situ Temperature Monitoring in 3D Cell Matrices

Wei Yu , Olivier Deschaume , Lens Dedroog , Christian Jose Garcia Abrego , Pengfei Zhang , Jolan Wellens , Yovan de Coene , Stijn Jooken , Koen Clays , Wim Thielemans , Christ Glorieux , Carmen Bartic ,

• 2108234
• Version of Record online: 17 October 2021

A light-addressable nanocomposite hydrogel as an active 3D extracellular matrix is reported, where temperature gradients and mechanical deformation can be generated locally and monitored optically, at the single cell level. Remote cell actuation and in situ parameter monitoring are essential in developing new emerging tools for cell biology and tissue engineering.

Fabric-Assisted MXene/Silicone Nanocomposite-Based Triboelectric Nanogenerators for Self-Powered Sensors and Wearable Electronics

Md Salauddin , S. M. Sohel Rana , Muhammad Toyabur Rahman , Md. Sharifuzzaman , Pukar Maharjan , Trilochan Bhatta , Hyunok Cho , Sang Hyun Lee , Chani Park , Kumar Shrestha , Sudeep Sharma , Jae Yeong Park ,

• 2107143
• Version of Record online: 17 October 2021

A fabric electrode and double-side-contact TENG (DSC-TENG) based on a fabric-assisted micropatterning method on a highly negative MXene/silicone nanocomposite surface (charge generating) with MXene layer (charge trapping) for self-powered sensors and wearable electronics applications. The intentionally designed DSC-TENG is waterproof, safe from humidity, and exhibits stable and durable output performance, soft, and comfortable wearing.

Spiral Metalens for Phase Contrast Imaging

• 2106050
• Version of Record online: 17 October 2021

A novel metalens, of which the phase profile is a sum of the hyperbolic phase and the spiral phase with a topological charge of 1, performs the 2D isotropic phase contrast imaging. The metalens operates under the visible broadband range with a compact form factor and achieves a submicrometer resolution of up to 0.78 µm.

Palladium-Based Metallic Glass with High Thrombogenic Resistance for Blood-Contacting Medical Devices

• 2108256
• Version of Record online: 17 October 2021

Metallic biomaterials are inevitable for the functioning of mechanical blood pumps but induce a thrombosis response upon contact with blood that can be life-threatening. This work showcases an amorphous metal based on noble palladium that largely outperforms a state-of-the-art titanium alloy. Through combination of material and biological investigations, this work unravels mechanistic insights underlying the low thrombogenicity of Pd-based metallic glass.

Hydrogen-Bonding Reinforced Flexible Composite Electrodes for Enhanced Energy Storage

• 2108003
• Version of Record online: 17 October 2021

By smartly designing the composite structures of a positive electrode (Co-Cu-DH@eRG) and a negative electrode (FeOOH@eRG) via a simple one-step electrodeposition method, the energy storage performance of the flexible rechargeable aqueous battery is largely enhanced. The strategy for the synthesis of the composite electrode with reliable interfacial hydrogen bonding is expected to inspire the design of other metal hydroxides.

On the Durability of Iridium-Based Electrocatalysts toward the Oxygen Evolution Reaction under Acid Environment

• 2108465
• Version of Record online: 17 October 2021

The durability of iridium (Ir)-based electrocatalysts is critical to proton exchange membrane water electrolyzers, but current studies are not adequate. Herein, the durability issues of Ir-based oxygen evolution reaction electrocatalysts in acid media are reviewed with a focus on the dissolution behavior of active Ir species, aiming to provide inspiration for the future development of Ir-based electrocatalysts.

An Ion-Dipole-Reinforced Polyether Electrolyte with Ion-Solvation Cages Enabling High–Voltage-Tolerant and Ion-Conductive Solid-State Lithium Metal Batteries

Kun Zhang , Feng Wu , Xinran Wang , Lumin Zheng , Xiaoyu Yang , Huichun Zhao , Yuheng Sun , Wenbin Zhao , Ying Bai , Chuan Wu ,

• 2107764
• Version of Record online: 16 October 2021

An ion-dipole-reinforced composite solid electrolyte (PHMP) is proposed, synergistically achieving high-voltage stability (4.6 V), high ion-conduction (25 °C, 1.26 × 10⁻⁴ S cm⁻¹), flexible-rigid mechanical properties, and dendrite suppression. The unique structure facilitates salt dissociation and ion diffusion and restrains proton-induced high-voltage decomposition. The structural designability and controllability of hyperbranched polyether solid electrolyte provide fresh insights into solid-state lithium metal batteries.

A Self-Healing and Ionic Liquid Affiliative Polyurethane toward a Piezo 2 Protein Inspired Ionic Skin

Chao Chen , Wu Bin Ying , Jiayi Li , Zhengyang Kong , Fenglong Li , Han Hu , Ying Tian , Do Hwan Kim , Ruoyu Zhang , Jin Zhu ,

• 2106341
• Version of Record online: 16 October 2021

Ionic skin (I-Skin) has the advantage of feasible compatibility with biological systems. Nevertheless, the leaking of ionic liquid (IL) in the polymer/IL matrix and the lack of self-healing may seriously affect the sensitivity and stability of the ionic skin. Here, an ionic polyurethane (i-PU) is designed, which is capable of self-healing and confinement of the IL.

4D Printing of Engineered Living Materials

• 2106843
• Version of Record online: 15 October 2021

Direct-ink-write printing of engineered living materials facilitates the spatial control of yeast strain and quantity within synthetic hydrogels. Printed materials morph into programmed forms in response to engineered conditions dictated by genetics of the yeast. Using this programmed shape change, drug reservoirs made from these composites are shown to release encapsulated materials in response to specific biochemical cues.

Intrinsic Magnetic Properties of a Highly Anisotropic Rare-Earth-Free Fe₂P-Based Magnet

Yangkun He , Peter Adler , Sebastian Schneider , Ivan Soldatov , Qingge Mu , Horst Borrmann , Walter Schnelle , Rudolf Schaefer , Bernd Rellinghaus , Gerhard H. Fecher , Claudia Felser ,

• 2107513
• Version of Record online: 15 October 2021

The authors report the intrinsic highly-anisotropic magnetic properties of Co and Si co-doped single crystals (Fe_{1− y} Co _y )₂P_{1− x} Si _x . A maximum room temperature magnetocrystalline anisotropy of 1.09 MJ m^–3 is achieved, with a saturation magnetization of 0.96 T and a Curie temperature of 506 K, making this material promising for permanent magnets.

Large Spin-to-Charge Conversion at Room Temperature in Extended Epitaxial Sb₂Te₃ Topological Insulator Chemically Grown on Silicon

Emanuele Longo , Matteo Belli , Mario Alia , Martino Rimoldi , Raimondo Cecchini , Massimo Longo , Claudia Wiemer , Lorenzo Locatelli , Polychronis Tsipas , Athanasios Dimoulas , Gianluca Gubbiotti , Marco Fanciulli , Roberto Mantovan ,

• 2109361
• Version of Record online: 15 October 2021

By conducting room temperature spin pumping ferromagnetic resonance, a high spin-to-charge conversion occurring in the large area Sb₂Te₃ topological insulator epitaxially grown by metal–organic chemical vapor deposition on 4″ Si(111) is demonstrated. An inverse Edelstein effect length λ_IEE in the range of 0.28–0.61 nm is measured, which opens viable routes toward the future technology-transfer of chemically produced topological insulators.

Advancement of Bismuth-Based Materials for Electrocatalytic and Photo(electro)catalytic Ammonia Synthesis

• 2106713
• Version of Record online: 15 October 2021

This review presents an insightful and comprehensive discussion on the advancement in bismuth-based materials for photocatalytic, electrocatalytic, and photoelectrocatalytic nitrogen reduction reaction (NRR) to ammonia. The fundamental knowledge, including thermodynamics, mechanisms, reaction systems, evaluation aspects of NRR, and product quantification is introduced. The strategies for improving the performance, together with scientific reasoning and exhibited activities, are discussed in detail.

Ternary Transition Metal Chalcogenide Nb₂Pd₃Se₈: A New Candidate of 1D Van der Waals Materials for Field-Effect Transistors

Byung Joo Jeong , Kyung Hwan Choi , Jiho Jeon , Sang Ok Yoon , You Kyoung Chung , Dongchul Sung , Sudong Chae , Bum Jun Kim , Seungbae Oh , Sang Hoon Lee , Chaeheon Woo , Tae Yeong Kim , Jungyoon Ahn , Jae-Hyun Lee , Joonsuk Huh , Hak Ki Yu , Jae-Young Choi ,

• 2108104
• Version of Record online: 14 October 2021

A 1D van der Waals Nb₂Pd₃Se₈ is synthesized by a chemical vapor transport reaction. Field-effect transistors are fabricated on mechanically exfoliated Nb₂Pd₃Se₈ nanowires, displaying electron mobility and I _on/I _off ratio values of 31 cm² V⁻¹ s⁻¹ and ≈10⁴, respectively. It is confirmed that Nb₂Pd₃Se₈ field effect transistors can form a stable ohmic contact with an extremely low Schottky barrier for the gold electrode.

Significant Dark Current Suppression in Organic Photodetectors Using Side Chain Fluorination of Conjugated Polymer

Byoungwook Park , Juhyoung Jung , Dae-Hee Lim , Hanbee Lee , Sungjun Park , Minju Kyeong , Seo-Jin Ko , Seung Hun Eom , Seung-Hoon Lee , Changjin Lee , Sung Cheol Yoon ,

• 2108026
• Version of Record online: 13 October 2021

The suppression of dark current density directly affects the detectivity of organic photodetectors. This study demonstrates that the fluorination of the alkyl side chains of conjugated polymers can lead to the formation of closely and evenly stacked molecular structures that decreases the number of trap states and degree of energetic disorder, thereby effectively suppressing the dark current density.

Descriptors for the Evaluation of Electrocatalytic Reactions: d-Band Theory and Beyond

• 2107651
• Version of Record online: 13 October 2021

The descriptors bridge the gap between the structural design of the electrocatalysts and their boosted electrocatalytic performance to close the hydrogen, carbon, and nitrogen cycle, thus offering guiding principles for rational construction of electrocatalysts with desired activity, selectivity, and long-term stability.

A New Printable Alginate/Hyaluronic Acid/Gelatin Hydrogel Suitable for Biofabrication of In Vitro and In Vivo Metastatic Melanoma Models

Rafael Schmid , Sonja K. Schmidt , Rainer Detsch , Hannes Horder , Torsten Blunk , Stefan Schrüfer , Dirk W. Schubert , Lena Fischer , Ingo Thievessen , Stefanie Heltmann-Meyer , Dominik Steiner , Dominik Schneidereit , Oliver Friedrich , Anika Grüneboom , Hanna Amouei , Harald Wajant , Raymund E. Horch , Anja K. Bosserhoff , Andreas Arkudas , Annika Kengelbach-Weigand ,

• 2107993
• Version of Record online: 13 October 2021

Bioinks for 3D printing with cells have several requirements. An alginate/hyaluronic acid/gelatin hydrogel (Alg/HA/Gel) is introduced and characterized with good printability and cell survival for in vitro approaches and vascularized in vivo melanoma models that facilitate stem cell differentiation, tumor growth, progression, vascularization, and metastases. It is a valuable tool for basic research and drug development.

MOF-Based Sustainable Memory Devices

• 2107949
• Version of Record online: 13 October 2021

Metal–organic frameworks (MOFs) are considered potential active materials for electronic, optical, and magnetic memory devices. MOFs are highlighted as sustainable materials for a new generation of memristive devices due to their metastability, scalability, and low energy consumption. Analysis of the market of microelectronics and mineral consumption allows speculating about the future development of MOF-based memory devices and socio-economic profits.

Printable Tough Adhesive for Instant Fatigue-Resistant Bonding of Diverse Surfaces

• 2107732
• Version of Record online: 13 October 2021

A rapid one-step strategy for printable tough adhesives is for the first time reported achieving strong, tough adhesion on various wet and dry, porous and nonporous surfaces in seconds, which is widely compatible with casting, painting, and typical patterning/printing techniques, therefore showing great application potential in printing complicated hydrogel composites, 4D shape-memory structures, and wearable electronic devices.

A Biomimetic Self-Shield Interface for Flexible Perovskite Solar Cells with Negligible Lead Leakage

Xiangchuan Meng , Xiaotian Hu , Yanyan Zhang , Zengqi Huang , Zhi Xing , Chenxiang Gong , Li Rao , Hongyu Wang , Fuyi Wang , Ting Hu , Licheng Tan , Yanlin Song , Yiwang Chen ,

• 2106460
• Version of Record online: 13 October 2021

Stability and toxicity of PSCs are bottleneck challenges for their commercial development. Herein, biomimetic Di-g molecules are introduced to the encapsulated FPSCs as the interface layer, which improves the efficiency of 1.01 cm² FPSCs up to 20.29%. Importantly, they demonstrate excellent mechanical stability and lead leakage suppression, the efficiency maintains 85% of initial value without ion leakage under 10 000 bending cycles.

Approaching Trap-Minimized Polymer Thin-Film Transistors

• 2105933
• Version of Record online: 12 October 2021

A method to approach trap-minimized polymer thin-film transistors (TFTs) is demonstrated. The combination of Cytop gate dielectric, printed patterned silver electrodes, and push-coated semiconducting polymer layer of PDVT-10, which involves a self-passivation mechanism, is useful to obtain bottom-gate, bottom-contact-type TFTs with a trap-minimized interface that show exceptionally sharp switching and bias-stress-free characteristics.

High-Performance Organic Solar Cells from Non-Halogenated Solvents

• 2107827
• Version of Record online: 12 October 2021

High-performance organic solar cells (OSCs) are feasibly obtained from the hot spin coating of different kinds of non-halogenated solvents. It is revealed that the blend phase evolution during solution-to-solid transition has a correlation to the substrate temperature. As result, high-performance OSCs are obtained with power conversion efficiencies of 18.25% in o-xylene, 18.20% in p-xylene, and 18.12% in toluene, respectively.

Stable Cycling of All-Solid-State Batteries with Sacrificial Cathode and Lithium-Free Indium Layer

• 2108203
• Version of Record online: 12 October 2021

A sulfide-based all-solid-state battery consisting of a lithium nitride (Li₃N) sacrificial cathode and a Li-free indium layer shows stable cycling performance owing to the combined effects of the Li₃N compensating for Li loss caused by interfacial side reactions along with contributing to improved interparticle contact by additional volume expansion of In and the dendrite-free In layer exhibiting exceptional interfacial stability.

Rapid Fabrication of 3D Chiral Microstructures by Single Exposure of Interfered Femtosecond Vortex Beams and Capillary-Force-Assisted Self-Assembly

Deng Pan , Shunli Liu , Jiawen Li , Jincheng Ni , Chen Xin , Shengyun Ji , Zhaoxin Lao , Chenchu Zhang , Bing Xu , Rui Li , Shengyin Fan , Pengju Li , Yanlei Hu , Dong Wu , Jiaru Chu ,

• 2106917
• Version of Record online: 12 October 2021

A hybrid strategy to efficiently prepare chiral microstructures via 3D chiral laser beam and capillary-force-assisted self-assembly is proposed. The chiral optical field generation and physical mechanism behind the emergence of chirality are studied in this work. The 3D chiral microstructures have promising prospects in the field of micro/nano robots, optical sensing, advanced photonic devices.

Grain-Boundary-Rich Artificial SEI Layer for High-Rate Lithium Metal Anodes

• 2107249
• Version of Record online: 12 October 2021

A grain-boundary-rich artificial solid electrolyte interface (SEI) layer is developed through a facile spontaneous reaction between Li metal and ZrO(NO₃)₂. The multicomponent inorganic SEI enables the rapid diffusion of Li ions at the interface and renders an enhanced cyclic stability at a high current density and a high areal capacity.

Oligomycin A Induces Apoptosis-to-Pyroptosis Switch against Melanoma with Sensitized Immunotherapy

• 2106332
• Version of Record online: 12 October 2021

Melanoma-targeting RGD-grafted and oligomycin A encapsulated iron-based metal-organic framework nanoparticles (FeOA NPs) are constructed. It can be found that FeOA NPs could effectively induce the intense mitochondrial oxidative stresses, leading to the cell apoptosis-to-pyroptosis shift and finally the infiltrated immune responses. Pyroptosis-sensitized immunotherapy can be achieved when FeOA NPs and immune checkpoint blockade therapeutics are synergized.

Packing Sulfur Species by Phosphorene-Derived Catalytic Interface for Electrolyte-Lean Lithium–Sulfur Batteries

Jiangqi Zhou , Tiantian Wu , Yu Pan , Jian Zhu , Xia Chen , Chengxin Peng , Chengyong Shu , Long Kong , Wei Tang , Shu-Lei Chou ,

• 2106966
• Version of Record online: 12 October 2021

A phosphorene/graphene heterostructure architecture is developed and encapsulates the sulfur sphere to form a hermetic catalytic composite, which serves as an advanced sulfur host for Li–S batteries. The cage structure and electronic engineering facilitates fast ions transfer and strengthens the adsorption for polysulfides, imposing superior sulfur confinement and promoting the polysulfides conversion significantly.

Effervescence-Inspired Self-Healing Plastrons for Long-Term Immersion Stability

• 2107831
• Version of Record online: 12 October 2021

Underwater performance of superhydrophobic/superamphiphobic surfaces relies on the robustness and durability of the gas-layer (plastron). A simple and scalable technique of effervescence-inspired on-demand plastron repair is presented. Surfaces do not suffer from any performance-losses even after 2 months of continuous immersion.

Reversible Cation-Mediated Anionic Redox in Defect Spinel Structure for High Power Batteries

• 2108278
• Version of Record online: 12 October 2021

This is the first report of cation-mediated anionic redox in spinel-based cathode materials for lithium-ion batteries. Li_0.98K_0.01Mn_1.86Ni_0.11O₄ shows 1.7× (250 mAh g⁻¹ at 1C) of the theoretical capacity of LiMn₂O₄ spinel with unseen kinetics and efficiency. The authors present how doping and cation vacancy generation can stabilize spinel structure to provide a fully reversible anionic process without voltage hysteresis.

Zwitterion-Initiated Spontaneously Polymerized Super Adhesive Showing Real-Time Deployable and Long-Term High-Strength Adhesion against Various Harsh Environments

Chunyan Cui , Ruoheng Gu , Tengling Wu , Zuoying Yuan , Chuanchuan Fan , Yuan Yao , Ziyang Xu , Bo Liu , Jianyong Huang , Wenguang Liu ,

• 2109144
• Version of Record online: 12 October 2021

Zwitterion-initiated spontaneous polymerization is harnessed to construct an array of super adhesives by simply mixing 4-aminostyrene with different acidic polymers. The fast cured adhesive can strongly glue diverse materials in various harsh liquids and low temperature environments due to the excellent ability to a remove liquid barrier layer on the substrate surface and multiple interactions formed between the adhesive and surface.

Programmable Tactile Feedback Patterns for Cognitive Assistance by Flexible Electret Actuators

Tao Jiang , Wenying Qiu , Zhaoyang Li , Xing Ye , Yuhan Liu , Yushi Li , Xiaohao Wang , Junwen Zhong , Xiang Qian , Liwei Lin ,

• 2107985
• Version of Record online: 10 October 2021

A flexible actuator based on high surface potential electret can work with low driving voltage and have large output force. In typical cognitive assistance applications, a tactile-assisted navigation prototype with programmable commands and a tactile-based braille prototype constructed via a 6-pixels actuator array are realized.

Ultrasound-Augmented Nanocatalytic Ferroptosis Reverses Chemotherapeutic Resistance and Induces Synergistic Tumor Nanotherapy

• 2107529
• Version of Record online: 10 October 2021

An ultrasound (US)-responsive/enhanced catalytic and chemotherapeutic liposomal nanocomplex is constructed by co-encapsulating efficient iron-containing Fenton catalyst GA-Fe(II) and FDA-approved chemotherapeutic drug doxorubicin hydrochloride (DOX) to synergistically induce DOX-resistant breast cancer cell (MCF-7/ADR) death. The combination of US-augmented Fenton nanocatalytic therapy and chemotherapy reverses tumor drug resistance and effectively inhibits tumor growth via a complementary ferroptosis/apoptosis-triggering strategy.

Wide Voltage Aqueous Asymmetric Supercapacitors: Advances, Strategies, and Challenges

• 2108107
• Version of Record online: 10 October 2021

The technology of wide voltage aqueous asymmetric supercapacitors (ASCs) offers the opportunity for achieving high energy density for supercapacitors without sacrificing their advantages. This review is aimed at providing readers with the comprehensive insights and updates related to the recent progress for achieving high performance wide voltage aqueous ASCs. Moreover, several key scientific challenges and our perspectives about wide voltage aqueous ASCs are also discussed.

The Impact of Ion Migration on the Electro-Optic Effect in Hybrid Organic–Inorganic Perovskites

• 2107939
• Version of Record online: 08 October 2021

Mixed halide perovskites are expected to have higher spontaneous polarization as the overall symmetry is lowered. Compared to the pure iodide perovskite, the mixed sample exhibits a ≈50× higher electro-optic (EO) response at 1 kilohertz. However, this is shown to be very frequency-dependent, and the high response is attributed to ion migration.

Modulating Protein Corona and Materials–Cell Interactions with Temperature-Responsive Materials

• 2106353
• Version of Record online: 08 October 2021

Temperature-responsive polymers exhibit a hydrophobicity change upon temperature. Materials from these polymers are employed for proliferating cells at 37 °C and harvesting them by cooling without harming the cell membranes. Furthermore, proteins can be easily separated using these materials by adsorption at high temperature and collection by cooling.

Radioluminescence Imaging of Drug Elution from Biomedical Implants

• 2106508
• Version of Record online: 08 October 2021

A method to measure, through tissue, the presence and elution of tritium labeled analytes on implanted medical devices is described. Specifically, ³H-vancomycin generates light from orthopedic plates that are coated with scintillators; elution of the ³H-vancomycin causes luminescence to fall relative to a reference region providing a sensitive and quantitative, noninvasive measurement.

Lattice Proton Intercalation to Regulate WO₃-Based Solid-Contact Wearable pH Sensor for Sweat Analysis

Yitian Tang , Shiyu Gan , Lijie Zhong , Zhonghui Sun , Longbin Xu , Chunxian Liao , Kanglong Lin , Xiaoqing Cui , Dequan He , Yingming Ma , Wei Wang , Li Niu ,

• 2107653
• Version of Record online: 08 October 2021

An approach for electrochemical lattice proton intercalation is proposed to regulate the WO₃-based inorganic pH sensor. The proton intercalation enhances the conductivity and accelerates the proton transport, which overcomes the issues of low sensitivity and slow response. This proton intercalated WO₃ is integrated into a wearable sensor for on-body pH monitoring.

Novel Thermotolerant and Flexible Polyimide Aerogel Separator Achieving Advanced Lithium-Ion Batteries

• 2106176
• Version of Record online: 08 October 2021

A novel thermotolerant polyimide aerogel separator is prepared and its pyrolysis mechanism is clarified through in situ synchrotron vacuum UV photoionization mass spectrometry experiments and DFT calculations. Benefiting from its high porosity and thermal stability, the prepared separator can help to achieve the outstanding electrochemical performance of the used battery and improve the thermal safety of LIBs.

Monolithic Ni-Mo-B Bifunctional Electrode for Large Current Water Splitting

• 2107308
• Version of Record online: 08 October 2021

A novel monolithic bifunctional catalytic electrode with a unique 3D hollow foam structure for the first time is developed. The facile preparation, high mechanical strength, high gas mass transfer ability, and outstanding overall water splitting performance of this structure enable it to be a potential electrode for large current density water splitting powered by intermittent sustainable energy.

Targeted Therapeutics Delivery by Exploiting Biophysical Properties of Senescent Cells

• 2107990
• Version of Record online: 08 October 2021

The chronic accumulation of senescent cells is a significant contributor to many age-related diseases. Cell specificity is integral to ensure therapeutic safety and efficacy for optimal clinical translation during delivery of therapeutics to eliminate or rejuvenate senescent cells. This review discusses how biophysical changes in senescent cells can be exploited for targeted therapeutics delivery.

Resolving the Molecular Origin of Mechanical Relaxations in Donor–Acceptor Polymer Semiconductors

Nrup Balar , Jeromy James Rech , Salma Siddika , Runqiao Song , Harry M. Schrickx , Nadeem Sheikh , Long Ye , Anthony Megret Bonilla , Omar Awartani , Harald Ade , Wei You , Brendan T. O'Connor ,

• 2105597
• Version of Record online: 08 October 2021

The molecular origin of the complex relaxation behavior in donor-acceptor copolymers is described. Through studying a systematic set of polymers, thermal relaxations can be ascribed to side chains, features along the backbone, and aggregates. The results also indicate the lack of a glass transition. It is then demonstrated that these relaxations provide a basis for designing polymer semiconductors for stretchable applications.

In Situ Study of FePt Nanoparticles-Induced Morphology Development during Printing of Magnetic Hybrid Diblock Copolymer Films

Wei Cao , Shanshan Yin , Martin Bitsch , Suzhe Liang , Martina Plank , Matthias Opel , Manuel A. Scheel , Markus Gallei , Oliver Janka , Matthias Schwartzkopf , Stephan V. Roth , Peter Müller-Buschbaum ,

• 2107667
• Version of Record online: 08 October 2021

The influence of FePt nanoparticles (NPs) on the film formation of hybrid diblock copolymer films is investigated with in situ grazing-incidence small-angle X-ray scattering during printing. The two characteristic morphology development processes, domain shrinkage, and duration of a metastable state are altered by the FePt NPs, resulting in a different final film morphology compared with a pure diblock copolymer film.

High-Performance Si Photocathode Enabled by Spatial Decoupling Multifunctional Layers for Water Splitting

Zongwei Mei , Yongji Chen , Shengfu Tong , Yang Li , Jian Liu , Lizhi Sun , Wu Zhong , Xinyan Dong , Yuchen Ji , Yuan Lin , Haibiao Chen , Feng Pan ,

• 2107164
• Version of Record online: 07 October 2021

Spatial decoupling multifunctional layers are fabricated for efficient and stable Si photocathode for water splitting in acidic electrolyte. The SiN _x layer allows efficient light incidence, and the glass layer/Ag patterned dots/Pt act as the transmission channel and catalytic reaction sites of photoexcited electrons. Simultaneously, the SiN _x and glass layers effectively protect the Si photocathode from corrosion in acidic electrolyte.

Atomic-Scale Characterization of Negative Differential Resistance in Ferroelectric Bi₂WO₆

• 2105256
• Version of Record online: 07 October 2021

Negative differential resistance (NDR) behaviors are observed in (001)-oriented ferroelectric Bi₂WO₆ terraces by using scanning tunneling microscopy, indicating a robust resonant tunneling through confined energy levels within the two-dimensional [WO₄]^2- quantum well. The atomically resolved NDR found in such a transition metal oxide offers a unique band structure for novel ferroelectric-based devices (fast switches, oscillators, and frequency-locking circuits).

Molecularly Tailored Interface for Long-Term Xenogeneic Cell Transplantation

• 2108221
• Version of Record online: 07 October 2021

A macroencapsulation device for xenogeneic cell transplantation is developed. The device consists of a porous chitosan pouch with an adhesive inner surface that promotes cell viability and a cell repellent outer surface that minimizes fibrosis. The device supports long term (6 months) transplantation of human primary hepatocytes into an immunocompetent mice.

Flexible and Robust 3D a-SiGe Radial Junction Near-Infrared Photodetectors for Rapid Sphygmic Signal Monitoring

• 2107040
• Version of Record online: 07 October 2021

Flexible and robust near-infrared (NIR) a-SiGe:H p-i-n radial junction photodetectors, built upon silicon nanowires grown directly upon soft Al foils, demonstrate a successful photoplethysmography detection of sphygmic signals, working in a reflectance mode with a single NIR probing light @800 nm, which are promising to enable a new rapid diagnostic dimension for efficient and accurate real-time health monitoring.

Synergistic Electrocatalysts for Alkaline Hydrogen Oxidation and Evolution Reactions

• 2107479
• Version of Record online: 07 October 2021

In this review, the recent progress and strategies in constructing synergistic active sites for advancing alkaline hydrogen oxidation/evolution reaction electrocatalysts are systematically summarized, aiming at promoting the commercialization of hydrogen-based energy conversion systems.

Light-Soaking Induced Optical Tuning in Rare Earth-Doped All-Inorganic Perovskite

Yu Ouyang , Xingxing Jiang , Feng Jiang , Lihui Li , Hepeng Zhao , Chi Zhang , Min Zheng , Weihao Zheng , Ying Jiang , Xiaoli Zhu , Yexin Feng , Xiujuan Zhuang ,

• 2107086
• Version of Record online: 07 October 2021

Lanthanum ions doped 3D all-inorganic perovskite possess a band-edge PL from the α-phase and a self-trapped exciton emission from the δ-phase. They present a color tuning capability spanning from green to red by extension of the soaking time, and the emission properties can recover by removing the light-soaking and undergoing a certain recovery time.

A Flash Vacuum-Induced Reaction in Preparing High Performance Thermoelectric Cu₂S

Yimeng Yu , Dongwang Yang , Jun Li , Mingqi Zhang , Hao Luo , Qi Liang , Hengqiang Ye , Qingjie Zhang , Xinfeng Tang , Jinsong Wu ,

• 2107284
• Version of Record online: 07 October 2021

Cu and S in the powder form can spontaneously react in a low vacuum with a very fast reaction speed. Observation by transmission electron microscopy clarifies that the Cu-atom is gradually oxidized along with S^2- ion intercalation. After plasma activated sintering, a peak ZT value of the Cu_2–xS bulk material is reached 1.56 around 800 K.

Crown Ether-Functionalized Complex Emulsions as an Artificial Adaptive Material Platform

• 2107688
• Version of Record online: 07 October 2021

Supramolecular recognition at the liquid–liquid interface of complex emulsions: A novel adaptive soft material platform based on crown ether-functionalized reconfigurable complex emulsions is reported. The complex emulsions autonomously adapt their configuration in response to multiple independent and competing molecular recognition events, which provides a new avenue in the creation of liquid colloids that display autonomous chemo-intelligent capabilities.

Emerging Wearable Sensors for Plant Health Monitoring

• 2106475
• Version of Record online: 07 October 2021

This perspective article summarizes the recent progress in wearable plant sensors according to their functionality, including plant growth sensors, physiology, and microclimate sensors, chemical sensors, and multifunctional sensors. The design and mechanism of each type of wearable sensors and practical applications are discussed. The challenges and perspective for future development of the wearable plant sensors are presented.

Optimized Charge Transport in Molecular Semiconductors by Control of Fluid Dynamics and Crystallization in Meniscus-Guided Coating

• 2107976
• Version of Record online: 07 October 2021

A systematic investigation of the crystallization of 2,7-dioctyl[1]benzothieno[3,2-b] [1]benzothiophene (C8-BTBT) during a meniscus-guided coating is presented. Via computational modelling of the fluid dynamics and the crystallization, three casting-speed-dependent morphological subregimes are identified: I) isotropic domain-like; II) unidirectional crystal stripes; and III) corrugated dendritic. The second morphology provides an optimal processing window for the performance of organic field-effect transistors.

Unconventional Anomalous Hall Effect in the Canted Antiferromagnetic Half-Heusler Compound DyPtBi

Jie Chen , Hang Li , Bei Ding , Peng Chen , Tengyu Guo , Xing Xu , Dongfeng Zheng , Hongwei Zhang , Xuekui Xi , Wenhong Wang ,

• 2107526
• Version of Record online: 07 October 2021

DyPtBi compound, combining metamagnetic transitions and topological semimetal, exhibits a large anomalous Hall effect (AHE) when I and B are coplanar. The metamagnetic transitions combining strong spin-orbit coupling induce a large magneto band-structure effect. Then, It further produces tunable AHE. The strong magnetocrystalline anisotropy induces threefold AHE in the (111) plane.

A Review of Heteroatom Doped Materials for Advanced Lithium–Sulfur Batteries

• 2107166
• Version of Record online: 07 October 2021

Heteroatom doping is an effective strategy to manipulate the electronic structure and polarity of sulfur host materials, resulting in the enhancement of features and performance. This review summarizes the doping of non-metal heteroatoms and metal single atoms in carbon materials and metal compounds in Li-S batteries, and the mechanism of enhanced performance originating from heteroatom doping is overviewed.

Ultra-High Alignment of Polymer Semiconductor Blends Enabling Photodetectors with Exceptional Polarization Sensitivity

Harry M. Schrickx , Pratik Sen , Ronald E. Booth , Ali Altaqui , Jacob Burleson , Jeromy J. Rech , Jin-Woo Lee , Melike Biliroglu , Kenan Gundogdu , Bumjoon J. Kim , Wei You , Michael W. Kudenov , Brendan T. O'Connor ,

• 2105820
• Version of Record online: 07 October 2021

Polymer semiconductor bulk heterojunction films are aligned using molecular weight dependent strategies to achieve highly oriented blend films. Integrating the films in organic photodetectors, a polarized photocurrent ratio of over 15 is demonstrated at a wavelength of 530 nm. The intrinsically polarization sensitive photodetector is utilized to effectively image a polarized scene.

GeTe Nanosheets as Theranostic Agents for Multimodal Imaging and Therapy of Inflammatory Bowel Disease

Jun Ho Song , Taejun Yoon , Sun-Mi Lee , Chin Hee Mun , Dasol Kim , Jieun Han , Ju-Won Kim , Yonghee Bae , Taehee Kim , Young Nyun Park , Mann-Ho Cho , Yong-Beom Park , Kyung-Hwa Yoo ,

• 2107433
• Version of Record online: 07 October 2021

Germanium telluride–polyvinylpyrrolidone nanosheets (GeTe–PVP NSs) prepared using a simple top-down method show broad absorption and fluorescence spectra, enabling them to act as multimodal contrast agents for multispectral optoacoustic tomography and fluorescence imaging. In addition, GeTe–PVP NSs exhibit therapeutic effects in mitigating inflammatory colitis, suggesting that the oral administration of GeTe–PVP NSs may be used to treat inflammatory bowel diseases.

In Situ Chemical Patterning Technique

• 2107945
• Version of Record online: 07 October 2021

A universal in situ chemical patterning technique is proposed based on plasmonic nanochemistry, where plasmonic nanoparticles can be synthesized and simultaneously self-assembled exclusively following the maximum plasmonic field areas of Au nanohole arrays. The region-specific generated multiscale Ag nanoparticle-assembly arrays exhibit excellent surface-enhanced Raman scattering performance on quantitative detection and Raman imaging, which are applied to multilevel encryption applications.

Engineering of Ferroic Orders in Thin Films by Anionic Substitution

• 2107135
• Version of Record online: 07 October 2021

Multiferroism induced in perovskite SrNbO_{3− x} N _x thin-films: Ferroelectricity and ferromagnetism are tuned in niobium-based oxynitride thin-films under nitrogen content. In the study, experimental and theoretical efforts are combined synergistically to engineer, by anionic substitution in perovskite thin films, ferroic orders in an oxynitride prototype material. This particular X-site exploration in perovskite-like materials offers undiscovered design routes for revealing novel multifunctional materials.

β-Phase-Rich Laser-Induced Hierarchically Interactive MXene Reinforced Carbon Nanofibers for Multifunctional Breathable Bioelectronics

Md Sharifuzzaman , Md Abu Zahed , Sudeep Sharma , S M Sohel Rana , Ashok Chhetry , Young Do Shin , Md Asaduzzaman , Shipeng Zhang , Sanghyuk Yoon , Xue Hui , Hyosang Yoon , Jae Y. Park ,

• 2107969
• Version of Record online: 07 October 2021

Successfully produce laser-induced hierarchical carbon nanofibers (LIHCNFs) from β-phase rich MXene-PDFE nanofibers. Interestingly, the β-phase of the dehydrofluorinated MXene-PDFE nanofibers is converted into an sp²-hybridized graphitic structure during laser-induced carbonization. The LIHCNFs exhibiting high carbon yield, conductivity, flexibility, and stability. Using LIHCNFs and laser printing, successfully develop a skin-compatible and breathable e-tattoo for monitoring long-term biopotentials and human–machine interfaces.

Vacuum-Assisted Preparation of High-Quality Quasi-2D Perovskite Thin Films for Large-Area Light-Emitting Diodes

Chaoran Chen , Linxiang Zeng , Zhengyan Jiang , Zhenhua Xu , Yijun Chen , Zhen Wang , Shi Chen , Baomin Xu , Yaohua Mai , Fei Guo ,

• 2107644
• Version of Record online: 07 October 2021

An effective crystallization protocol for scalable deposition of quasi-2D perovskite emitting films is reported. Central to the technology is the deployment of a vacuum quenching process to the precursor film, which results in uniform and dense perovskite films with high photoluminescence efficiency. Light-emitting diode devices based on the blade-coated perovskite films yield a high efficiency of 8.24%.

Design of p-WSe₂/n-Ge Heterojunctions for High-Speed Broadband Photodetectors

• 2107992
• Version of Record online: 07 October 2021

A high-speed broadband photodetector based on vdW p-WSe₂/n-Ge heterojunction is demonstrated, and the performance is compared in the design aspect of Ge semiconductors. The results not only show that the p-WSe₂/n-Ge heterojunction can be a promising high-speed broadband photodetector up to near-infrared implementable in complementary metal-oxide-semiconductor design and process but also offers design strategies for photodetectors based on 2D/3D heterojunctions.

Organic Cathode Materials for Sodium-Ion Batteries: From Fundamental Research to Potential Commercial Application

Hang Zhang , Yun Gao , Xiao-Hao Liu , Zhuo Yang , Xiang-Xi He , Li Li , Yun Qiao , Wei-Hua Chen , Rong-Hua Zeng , Yong Wang , Shu-Lei Chou ,

• 2107718
• Version of Record online: 07 October 2021

A comprehensive summary on how to improve the electronic performance of organic cathode materials for the potential commercial application of organic sodium-ion batteries is presented.

Nanomaterial Strategies for Delivery of Therapeutic Cargoes

• 2107174
• Version of Record online: 07 October 2021

This review focuses on strategies for nanomaterial-based therapeutic delivery. Herein, advantages and limitations of nanomaterials and cargo are described, trends in attachment chemistries are highlighted, and safety considerations for ethical use of these systems are discussed. Together, these principles outline a potential framework for researchers looking to advance the field toward safe and effective therapeutics via rational design.

MEndR: An In Vitro Functional Assay to Predict In Vivo Muscle Stem Cell-Mediated Repair

Sadegh Davoudi , Bin Xu , Erik Jacques , Jose L. Cadavid , Matthew McFee , Chih-Ying Chin , Amir Meysami , Majid Ebrahimi , Mohsen A. Bakooshli , Kayee Tung , Henry Ahn , Howard J. Ginsberg , Alison P. McGuigan , Penney M. Gilbert ,

• 2106548
• Version of Record online: 07 October 2021

The in vitro MEndR assay recapitulates key early phases of in vivo skeletal muscle regeneration and can be used to assess the capability of drugs to modulate muscle stem cell-mediated repair to prioritize hits for in vivo transplantation experiments. This modular assay provides a practical tool to study the dynamics of muscle regeneration in response to injury, as well as niche repopulation, in a highly controllable format.

Rational Design of All Resistive Multifunctional Sensors with Stimulus Discriminability

Jeng-Hun Lee , Eunyoung Kim , Heng Zhang , Haomin Chen , Harun Venkatesan , Kit-Ying Chan , Jie Yang , Xi Shen , Jinglei Yang , Seokwoo Jeon , Jang-Kyo Kim ,

• 2107570
• Version of Record online: 05 October 2021

A flexible multifunctional sensor capable of simultaneously detecting and discriminating temperature and pressure stimuli in real time is developed, exclusively using electrospun carbon nanofiber films as the sensing material. For the first time in the literature, it demonstrates a stimulus decoupling capability by means of monitoring electrical resistance as the sole and yet, most convenient digital signal.

Polymeric Toroidal Self-Assemblies: Diverse Formation Mechanisms and Functions

• 2106036
• Version of Record online: 05 October 2021

Polymeric toroidal assemblies have attracted considerable attention because of their unique geometry and properties. In this review, the formation routes and functions of polymeric toroids are summarized. The significant role of theoretical simulations in revealing the formation mechanism and inherent structure of toroidal assemblies is emphasized.

Digital Assembly of Spherical Viscoelastic Bio-Ink Particles

Jinchang Zhu , Yi He , Linlin Kong , Zhijian He , Kaylen Y. Kang , Shannon P. Grady , Leander Q. Nguyen , Dong Chen , Yong Wang , Jose Oberholzer , Li-Heng Cai ,

• 2109004
• Version of Record online: 05 October 2021

A 3D bioprinting technology is developed to enable on-demand generation, deposition, and assembly of viscoelastic bio-ink droplets in a cytocompatible environment. A strategy is developed to independently control viscoelasticity and mesh size of bio-inks. The technique allows for easy manufacturing mechanically robust multiscale porous scaffolds, which can be used to encapsulate human pancreatic islets for sustained responsive insulin release.

Cyclometalated Pt(II)-Terpyridine Metallomesogen: What Is Visible or Invisible That Is a Matter of Molecular Packing and Orientation

Dong-Gue Kang , Minwoo Rim , Ki-Hyun Ryu , Kyung Min Lee , Nicholas P. Godman , Michael E. McConney , Luciano De Sio , Minwook Park , Dae-Yoon Kim , Kwang-Un Jeong ,

• 2106559
• Version of Record online: 05 October 2021

The Pt(II)-based metallomesogen shows the ability to on–off switch of luminescence in response to external stimuli. The metallomesogen is applied to patterned smart glass capable of selective sign indicators as well as anticounterfeiting optical security filters.

Nonmonotonic Coupled Dissolution-Precipitation Reactions at the Mineral-Water Interface

• 2106396
• Version of Record online: 05 October 2021

Using an ultrasensitive microbalance, nonmonotonic mass changes at mineral-water interfaces under flow of organic solutes are studied. It is shown that mineral dissolution and surface modification are closely coupled, and determined by precipitation propensities of organo-metal salts within the boundary layer. This provides a unified framework to understand the reactivity of minerals across complex environments, from biominerals to rock formations.

High Current Density and Long Cycle Life Enabled by Sulfide Solid Electrolyte and Dendrite-Free Liquid Lithium Anode

Jian Peng , Dengxu Wu , Fengmei Song , Shuo Wang , Quanhai Niu , Jieru Xu , Pushun Lu , Hong Li , Liquan Chen , Fan Wu ,

• 2105776
• Version of Record online: 05 October 2021

A battery configuration combining liquid lithium solution anode (dissolve lithium to essentially prevent lithium nucleation) and sulfide solid electrolyte (highest room-temperature ionic conductivity among all solid electrolytes and ideal mechanical ductility for fully compact layer simply by cold pressing) is proposed. Record-high current density (17.78 mA cm⁻²) and long cycle life (nearly 3000 h) are realized.

Custom Design of Protein Particles as Multifunctional Biomaterials

Bhuvana K. Shanbhag , Chang Liu , Pradeep G.C. , Tayyaba Younas , Kevin K.Y. Hu , Alex J. Fulcher , Weston B. Struwe , David Steer , Geoff Dumsday , Ian S. Harper , Philipp Kukura , Victoria S. Haritos , Lizhong He ,

• 2108039
• Version of Record online: 05 October 2021

Functional biomaterials composed of protein particles are readily produced via a design step—choosing protein(s) of interest and one of a selection of stimuli-responsive peptides and produced via bacterial expression of a single construct, then assembled into particles using mild triggers. Functional biomaterials are generated using this versatile approach having biocatalytic, binding, and sensing functionalities.

Intergrowth of Graphite-Like Crystals in Hard Carbon for Highly Reversible Na-Ion Storage

• 2106980
• Version of Record online: 05 October 2021

Hard carbon is regarded as the most promising anode material for Na-ion batteries, yet its disordered structure causes irreversible Na-ion storage. Graphite-like crystal, as a new carbon allotrope, is grown in highly ordered hard carbon, which breaks the traditional concept of taking hard carbon as an amorphous structure, achieving an extremely high initial Coulombic efficiency.

Intrinsic Nature of Negative Capacitance in Multidomain Hf_0.5Zr_0.5O₂-Based Ferroelectric/Dielectric Heterostructures

• 2108494
• Version of Record online: 05 October 2021

Materials with negative capacitance are promising for future energy efficient electronics. HfO₂- and ZrO₂-based ferroelectrics are ideal for such applications, but the origin of their negative capacitance has been unclear. Here it is shown that the negative capacitance observed in ferroelectric Hf_0.5Zr_0.5O₂ thin films is an intrinsic material property and not related to extrinsic effects of lateral domain wall motion.

Bioresponsive, Electroactive, and Inkjet-Printable Graphene-Based Inks

Alessandro Silvestri , Alejandro Criado , Fabrizio Poletti , Faxing Wang , Pablo Fanjul-Bolado , María B. González-García , Clara García-Astrain , Luis M. Liz-Marzán , Xinliang Feng , Chiara Zanardi , Maurizio Prato ,

• 2105028
• Version of Record online: 05 October 2021

Herein, the formulation of bioresponsive, electroactive, graphene-based inks is presented. The inks are based on graphene chemically modified with selected enzymes and an electrochemical mediator, to transduce the products of the enzymatic reaction into an electron flow proportional to the analyte concentration. The produced inks are compatible with inkjet printing, a low-cost technique that is industrially appealing, automatable, and scalable.

Innovative Materials Science via Machine Learning

• 2108044
• Version of Record online: 04 October 2021

Machine learning is being applied for materials discovery and performances prediction with undoubtedly tremendous application foreground. This article summarizes the challenges of machine learning in materials science, classify and highlight the design strategies, and propose possible perspectives for the future development, which would provide important scientific guidance for innovating materials science and technology in the future.

Interfacial Engineering of Wide-Bandgap Perovskites for Efficient Perovskite/CZTSSe Tandem Solar Cells

Deng Wang , Hongling Guo , Xin Wu , Xiang Deng , Fengzhu Li , Zhen Li , Francis Lin , Zonglong Zhu , Yi Zhang , Baomin Xu , Alex K.-Y. Jen ,

• 2107359
• Version of Record online: 04 October 2021

This study introduces an octyl-diammonium lead iodide (ODAPbI₄) interlayer onto the hole-transporting layer, which significantly reduces nonradiative recombination of wide-bandgap perovskite devices, enhancing the efficiency of wide-bandgap devices beyond 21%. By coupling a semitransparent device with a Cu₂ZnSn(S,Se)₄ (CZTSSe) cell, a four terminal perovskite/CZTSSe tandem cell with a power conversion efficiency of 22.27% is achieved.

Lithiothermic-Synchronous Construction of Mo-Li₂S-Graphene Nanocomposites for High-Energy Li₂S//SiC Battery

Junfan Zhang , Jing Wang , Mengmeng Qian , Bo Zhao , Ran Wang , Xuechun Hao , Xinwei Huang , Ruiwen Shao , Zhenyu Xing , Jing Xie , Bing Xu , Yuefeng Su , Feng Wu , Guoqiang Tan ,

• 2108305
• Version of Record online: 04 October 2021

A unique synchronous synthesis method is established that can simultaneously construct nano-Li₂S encapsulated into conductive protective layers, and accordingly, a coordination effect of catalysis and domain restriction for Li₂S cathodes is proposed. The excellent electrochemical performance makes this compact Mo-Li₂S-graphene material potentially viable for commercialization in both LiS batteries and S-based Li-ion batteries.

Visibly Clear Radiative Cooling Metamaterials for Enhanced Thermal Management in Solar Cells and Windows

• 2105882
• Version of Record online: 04 October 2021

A visibly clear and flexible radiative cooling metamaterial is demonstrated using optical modulator-infiltrated silica aerogel microparticles in a silicone elastomer. The metamaterials deployed in solar cells and windows can effectively suppress the rise in temperature under solar irradiation, thereby mitigating the performance degradation of solar cells by heating issues and suppressing the rise in temperature of indoor air.

Ionic-Liquid Induced Morphology Tuning of PEDOT:PSS for High-Performance Organic Electrochemical Transistors

Xihu Wu , Meera Stephen , Tania C. Hidalgo , Teddy Salim , Jokubas Surgailis , Abhijith Surendran , Xiaoqian Su , Ting Li , Sahika Inal , Wei Lin Leong ,

• 2108510
• Version of Record online: 03 October 2021

A series of morphology modulation on poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) using a library of ionic liquids as additives is carried out. It is demonstrated that an optimal morphology is realized using EMIM OTF ionic liquids that generate smaller fibril-like PEDOT-rich domains with relatively loose structures. Such optimal morphology improves ion accessibility and thus enabling high transconductance, fast transient response, and lower gate bias window simultaneously.

Ultrasensitive Molecular Sensors Based on Real-Time Impedance Spectroscopy in Solution-Processed 2D Materials

David C. Moore , Ali Jawaid , Robert Busch , Michael Brothers , Paige Miesle , Adam Miesle , Rahul Rao , Jonghoon Lee , Lucas K. Beagle , Michael Motala , Shay Goff Wallace , Julia R. Downing , Ajit Roy , Christopher Muratore , Mark C. Hersam , Richard Vaia , Steve Kim , Nicholas R. Glavin ,

• 2106830
• Version of Record online: 03 October 2021

The implementation of a real-time impedance spectroscopy approach results in ultrasensitive molecular sensors based on solution processed 2D nanomaterials. Through bypassing traditionally dominant interflake interactions and selectively extracting intraflake doping effects, detection of NO₂ down to 1 ppb is readily achievable with an ultimate limit of detection of 63 ppt.

Paper-Like Writable Nanoparticle Network Sheets for Mask-Less MOF Patterning

Renheng Bo , Mahdiar Taheri , Hongjun Chen , Jonathan Bradford , Nunzio Motta , Sachin Surve , Thanh Tran-Phu , Puneet Garg , Takuya Tsuzuki , Paolo Falcaro , Antonio Tricoli ,

• 2100351
• Version of Record online: 03 October 2021

Rapid and facile micrometer deep patterning of metal-organic frameworks (MOFs) on the centimeter scale surface. Diverse patterns with pure and crystalline sodalite (sod) Zeolitic Imidazolate Framework-8 composition have been showcased by the writing of nanoparticle network sheets, providing some unique beneficial features for the design of scalable and well-defined MOF geometries for various cross-disciplinary applications.

Learning from Nature: Constructing a Smart Bionic Structure for High-Performance Glucose Sensing in Human Serums

Wenyan Tian , Caichao Wan , Ken-Tye Yong , Sulai Liu , Song Wei , Chonghao Zhang , Xinyi Liu , Jiahui Su , Wenjie Cheng , Yiqiang Wu ,

• 2106958
• Version of Record online: 03 October 2021

A novel nature-inspired design concept (mimicking a "rock–soil–grass" geotexture system) is purposed to build a free-standing hierarchical micro-nano architecture. Thanks to the design and "gotong-royong" effects, the bionic structure achieves a superb glucose sensing property and stability. The self-made glucometer with the self-developed software demonstrates an ultra-high recovery rate, validating the potential for high-performance blood-glucose sensing.

A New Sodium Calcium Cyclotetravanadate Framework: "Zero-Strain" during Large-Capacity Lithium Intercalation

Liting Yang , Guisheng Liang , Haijie Cao , Siyuan Ma , Xuehua Liu , Xiao Li , Guanyu Chen , Wenbin You , Chunfu Lin , Renchao Che ,

• 2105026
• Version of Record online: 01 October 2021

Single-phase-transition "zero-strain" and a large reversible capacity (381 mAh g⁻¹) harmoniously coexist in a new Na₂Ca(VO₃)₄-nanowire Li⁺-storage material. Due to the volume-buffering capabilities of the large interstitial sites and electrochemical inactive Na-/Ca-based polyhedra in Na₂Ca(VO₃)₄, its volume variation and lattice strain are the smallest among the explored Li⁺-storage materials, leading to its excellent cyclic stability for thousands of cycles.

In Situ Management of Ions Migration to Control Hysteresis Effect for Planar Heterojunction Perovskite Solar Cells

Yichuan Chen , Wencai Zhou , Xiaoqing Chen , Xiaobo Zhang , Hongli Gao , Nabonswende Aida Nadege Ouedraogo , Zilong Zheng , Chang Bao Han , Yongzhe Zhang , Hui Yan ,

• 2108417
• Version of Record online: 01 October 2021

To understand the nature of hysteresis, theoretical mechanisms and experimental measurements are provided based on a combination of first-principles simulations, cross-section scanning electron microscopy images, and time-dependent photocurrent measurements. The defect assistance ion-migration process could be the primary contribution to hysteresis. The defect density is reduced via the in situ passivation of PbI₂ crystals, which prevents the migration of ions effectively, and the hysteresis index is decreased from 22.43% to 1.04%.

A Stiff yet Rapidly Self-Healable Elastomer in Harsh Aqueous Environments

• 2107538
• Version of Record online: 01 October 2021

A stiff PBMA-PEA rubber (≈48 MPa) with rapid self-healing capability (achieve 90% of maximum mechanical strength healing for 10 s) is obtained by incorporating high-density nano-sized physical crosslink and water-stable Debye forces, which have great potential in emergent repair in urgent and dangerous cases. A novel aqueous self-healing mechanism, which is unaffected by acids, bases, and salts, is also proposed.

Mass Production of 2D Manifolds of Graphene Oxide by Shear Flow

• 2107694
• Version of Record online: 01 October 2021

The chemical mechanism and GO domain dynamics during shear flow for the mass production of the 2D manifolds of GOs are unveiled. The 2D manifolds are multiwalled GO mesotubes with a GO interlayer spacing of 21 nm. The GO mesotube behaves like a soft gel with Young's modulus of 974 Pa and is robust to 10⁵ cycles of bending tests.

Aramid Nanofiber Membranes for Energy Harvesting from Proton Gradients

• 2102080
• Version of Record online: 01 October 2021

Aramid nanofibers (ANFs) based membranes with high chemical/thermal stability, mechanical strength, toughness, and surface charge density make them capable of high-performance osmotic energy harvesting from pH gradients generated upon wastewater dilution. Such output concentration energy power performance of ANFs membrane is 10× better compared to the current state-of-the-art membranes, which is ascribed to the high proton selectivity.

Biodegradation of Carbon-Based Nanomaterials: The Importance of "Biomolecular Corona" Consideration

• 2105649
• Version of Record online: 01 October 2021

In this conceptual perspective article, the importance of the biomolecular corona (BMC) and its possible impacts on the biodegradation of carbon-based nanomaterials are thoroughly discussed. Directions for future research along with the remaining challenges that need to be overcome to advance the field are presented with the focus on BMC impacts, study design, and reporting guidelines.

A Low Strain A-Site Deficient Perovskite Lithium Lanthanum Niobate Anode for Superior Li⁺ Storage

• 2106911
• Version of Record online: 01 October 2021

A-site deficient perovskite Li_0.1La_0.3NbO₃ is designed as the anode for Li⁺ storage, exhibiting high reversible capacity, safe operating potential, excellent rate, and cycling performance. The maximum volume change is only 1.17%, showing a low strain characteristic. The fast Li⁺ transport pathways with external → grain boundaries → lattice deficiencies are demonstrated, which leads to excellent electrochemical performance.

Synergistic Effect of Multi-Walled Carbon Nanotubes and Ladder-Type Conjugated Polymers on the Performance of N-Type Organic Electrochemical Transistors

Silan Zhang , Matteo Massetti , Tero-Petri Ruoko , Deyu Tu , Chi-Yuan Yang , Xianjie Liu , Ziang Wu , Yoonjoo Lee , Renee Kroon , Per O. Å. Persson , Han Young Woo , Magnus Berggren , Christian Müller , Mats Fahlman , Simone Fabiano ,

• 2106447
• Version of Record online: 01 October 2021

High-performance n-type organic electrochemical transistors are demonstrated by leveraging the high electrical conductivity of multi-walled carbon nanotubes (MWCNTs) and the large volumetric capacitance of the ladder-type π-conjugated redox polymer poly(benzimidazobenzophenanthroline) (BBL). MWCNTs provide a fast percolation path for electrons within the BBL matrix, yielding fast transistor transient response and high transconductance.

Water/Sulfolane Hybrid Electrolyte Achieves Ultralow-Temperature Operation for High-Voltage Aqueous Lithium-Ion Batteries

• 2106811
• Version of Record online: 01 October 2021

An elaborate strategy of water/sulfolane hybrid electrolyte not only expands the electrochemical stability window to 3.8 V, but also lowers the glass-transition temperature to −110 °C. The LiMn₂O₄/Li₄Ti₅O₁₂ full batteries assembled by the hybrid electrolyte display high voltage (2.7 V) and excellent low-temperature performance of 98% capacity retention from 0 to −20 °C, which can even discharge and illuminate an LED light at −65 °C.

From Glutinous-Rice-Inspired Adhesive Organohydrogels to Flexible Electronic Devices Toward Wearable Sensing, Power Supply, and Energy Storage

Hongwei Zhou , Jialiang Lai , Bohui Zheng , Xilang Jin , Guoxu Zhao , Hanbin Liu , Weixing Chen , Aijie Ma , Xusheng Li , Yuanpeng Wu ,

• 2108423
• Version of Record online: 01 October 2021

Glutinous-rice-inspired organohydrogels with integrated adhesiveness, stretchability, transparency, conductivity, anti-freezing, and moisture retention ability are developed by introducing amylopectin into a copolymer network and employed in flexible electronic devices toward wearable sensing, power supply, and energy storage. High sensitivity (gauge factor: = 8.82) for resistive strain sensors and a new sensitivity record (gauge factor: 9.43 kPa⁻¹)for hydrogel-based pressure sensors are achieved.

Low-Energy Oxygen Plasma Injection of 2D Bi₂Se₃ Realizes Highly Controllable Resistive Random Access Memory

Chujun Yin , Chuanhui Gong , Siying Tian , Yi Cui , Xuepeng Wang , Yang Wang , Zhenheng Hu , Jianwen Huang , Chunyang Wu , Bo Chen , Xianfu Wang , Chaobo Li ,

• 2108455
• Version of Record online: 01 October 2021

Highly controllable 2D resistive random access memory (RRAM) based on Bi₂Se₃ nanosheet is achieved by a damage-less ion implantation technology using ultralow-energy plasma. The transport mechanism, resistive switching mechanism, memory window, and working voltage in RRAM are successfully controlled by oxygen plasma injection. The memristors demonstrate excellent properties of high resistive switching ratio, outstanding cycling endurance, and retention performance.

High-Purity Monochiral Carbon Nanotubes with a 1.2 nm Diameter for High-Performance Field-Effect Transistors

Yahui Li , Miaomiao Zheng , Jian Yao , Wenbin Gong , Yijun Li , Jianshi Tang , Shun Feng , Ruyue Han , Qicheng Sui , Song Qiu , Lixing Kang , Hehua Jin , Dongming Sun , Qingwen Li ,

• 2107119
• Version of Record online: 01 October 2021

To isolate high-purity monochiral SWCNTs, enhanced ultracentrifugation and stepwise extraction processing strategies are developed. (10,8) and (12,5) SWCNTs with a monochirality purity of 92.3% and 95.6% show absorption and fluorescence emission peaks at ≈1.5 µm. The FETs of (10,8) species exhibit excellent electrical properties with a carrier mobility of 61 cm² V⁻¹ s⁻¹ and a semiconducting purity up to 99.94%.

A Regularity-Based Fullerene Interfacial Layer for Efficient and Stable Perovskite Solar Cells via Blade-Coating

• 2105917
• Version of Record online: 01 October 2021

The electron transport layer (ETL) plays a crucial part in extracting electrons and optimizing interfacial contact for perovskite solar cells (PVSCs). Herein, the EVA is introduced into PC₆₁BM to promote the orderly molecular stacking of ETLs. The PC₆₁BM:EVA-based MAPbI₃ PVSCs deliver a champion efficiency of 19.32% and regain 80% of initial efficiency after storage under 52% humidity for 1500 h.

Shining Light on Porous Liquids: From Fundamentals to Syntheses, Applications and Future Challenges

Dechao Wang , Yangyang Xin , Dongdong Yao , Xiaoqian Li , Hailong Ning , Hongmin Zhang , Yudeng Wang , Xiaoqian Ju , Zhongjie He , Zhiyuan Yang , Wendi Fan , Peipei Li , Yaping Zheng ,

• 2104162
• Version of Record online: 30 September 2021

This comprehensive review reports the very recent progress in porous liquids (PLs), including the fundamental chemistry, developmental history, synthetic strategies, applications, challenges, and future directions. This paper could inspire scientific communities who focus on materials for applications including gas sorption, membrane separation, catalytic conversion, thermal management, electrolyte, etc.

Imaging Dielectric Breakdown in Valence Change Memory

• 2102313
• Version of Record online: 30 September 2021

Valence change memory (VCM), a potential next-generation memory technology, features controlled, reversible dielectric breakdown through an oxide film. Applying scanning transmission electron microscope electron beam induced current imaging to custom Pt/HfO₂/Ti VCM devices in situ reveals their switching dynamics. Previously invisible processes, such as charge injection and oxygen vacancy migration, are revealed with excellent contrast and spatial resolution.

Compensated Ferrimagnet Based Artificial Synapse and Neuron for Ultrafast Neuromorphic Computing

• 2107870
• Version of Record online: 29 September 2021

By using compensated ferrimagnet of composition Co_0.80Gd_0.20 with perpendicular magnetic anisotropy, it is demonstrated that the behavior of spin-orbit torque switching in compensated ferrimagnets could be used to mimic biological synapses and neurons. By using the anomalous Hall effect and magneto-optical Kerr effect imaging measurements, the ultrafast stimulation (time scale down to 10 ns) of artificial synapses and neurons is illustrated.

N-methyl-2-pyrrolidone Iodide as Functional Precursor Additive for Record Efficiency 2D Ruddlesden-Popper (PEA)₂(Cs) _{n −1}Pb _n I_{3 n +1} Solar Cells

Zhizai Li , Bo Ma , Youkui Xu , Yutian Lei , Wei Lan , Gang Wang , Wenquan Li , Qiang Wang , Hao-Li Zhang , Zhiwen Jin ,

• 2106380
• Version of Record online: 29 September 2021

This study mainly focuses on using novel additive of N-methyl-2-pyrrolidone iodide to effectively conquer the uncontrollable crystallization kinetics during the CsPbI₃ film deposition process. Importantly, the morphologies, phase purity, photoproperties, and carrier behavior of CsPbI₃ in different dimensions are improved. Meanwhile, a record power conversion efficiency for quasi-2D (n = 20) CsPbI₃ of 14.59% is obtained with negligible hysteresis and strengthened stability.

Light-Driven Micromotors to Dissociate Protein Aggregates That Cause Neurodegenerative Diseases

• 2106699
• Version of Record online: 29 September 2021

Self-propelled light-driven single-component micromotors are used to disaggregate protein fibrils. In particular, concave BiVO₄ microspheres promote the efficient protein dissociation of the proteins thanks to the on-the-fly generation and uniform distribution of reactive oxygen species. With this conceptually innovative application of light-driven micromotors, new efficient medical treatments can be devised for the battle against those currently incurable neurodegenerative diseases.

Multicolored Nanocolloidal Hydrogel Inks

• 2105470
• Version of Record online: 29 September 2021

Nanocolloidal inks based on oppositely charged latex nanoparticles (NPs) are developed for 2D and 3D extrusion-based printing. The inks exhibit shear-thinning and self-healing properties dependent on NP size and charge density. Inks formed by NPs labeled with distinct fluorescent dyes are used to print multicolor patterns.

Dual-Modal Optoelectronic Synaptic Devices with Versatile Synaptic Plasticity

• 2107973
• Version of Record online: 29 September 2021

An optoelectronic synaptic device based on the hybrid structure of silicon nanocrystals (Si NCs) and poly(3-hexylthiophene) (P3HT) can work with dual modes. In the three-terminal mode, the device shows the wavelength-selective synaptic plasticity, which is applied to a light-stimulated artificial neural network. In the two-terminal mode, the device simulates the spike-rate-dependent plasticity and metaplasticity, which may be used for edge detection.

Self-Polymerization of Monomer and Induced Interactions with Perovskite for Highly Performed and Stable Perovskite Solar Cells

Ruiman Ma , Jiawei Zheng , Yu Tian , Can Li , Benzheng Lyu , Linyang Lu , Zhenhuang Su , Li Chen , Xingyu Gao , Jian-Xin Tang , Wallace C. H. Choy ,

• 2105290
• Version of Record online: 29 September 2021

Self-polymerized monomer 2-(dimethylamino) ethyl methacrylate (DMAEMA) is incorporated into perovskite films by the antisolvent additive engineering, attributing to uniform composition distribution, improved crystallinity, and phase stability. Meanwhile, the defects density and recombination is reduced due to the strong interactions with DMAEMA. Finally, the high performance and stability perovskite solar cells are achieved.

Giant Red-Shifted Emission in (Sr,Ba)Y₂O₄:Eu²⁺ Phosphor Toward Broadband Near-Infrared Luminescence

• 2103927
• Version of Record online: 29 September 2021

A red phosphor SrY₂O₄:Eu²⁺ is developed and the NIR emission via Sr/Ba cation substitution is realized. The substitution enables photoluminescence tuning from 620 to 773 nm and maintains good thermal stability. This study reveals the NIR luminescence mechanism of Eu²⁺ in oxide-based host and provides a design principle for exploiting Eu²⁺-doped NIR phosphors with good thermal stability.

Magnetoelectrical Clothing Generator for High-Performance Transduction from Biomechanical Energy to Electricity

Rui Wang , Zhuolin Du , Zhigang Xia , Jiaxin Liu , Pan Li , Zhenhua Wu , Yamei Yue , Yuanzhuo Xiang , Jinchang Meng , Dexiang Liu , Weilin Xu , Xiaoming Tao , Guangming Tao , Bin Su ,

• 2107682
• Version of Record online: 29 September 2021

In this article, a scalable-manufactured flexible magnetoelectrical clothing generator is shown that can generate electricity through the swing arms of humans. The clothing generator demonstrates high porosity that enables the users to feel comfortable, and is promising for power wearable electronic devices especially in harsh outdoor environments.

Fluorinated Black Phosphorene Nanosheets with Robust Ambient Stability for Efficient and Stable Perovskite Solar Cells

Tao Liu , Yinjiang Liu , Mengwei Chen , Xi Guo , Shuai Tang , Ruoqian Zhang , Zuji Xie , Jie Wang , Anping Gu , Shiwei Lin , Ning Wang ,

• 2106779
• Version of Record online: 29 September 2021

In addition to P-Pb coordination, there is a hydrogen bond between F⁻ and MA⁺/FA⁺ as well as an ionic bond between F⁻ and Pb²⁺ for perovskite/fluorinated black phosphorene (F-BP), thereby achieving high PCE (22.06%). Significantly, F-BP devices exhibit improved humidity and shelf-life stabilities due to the excellent ambient stability of F-BP nanosheets, resulting from antioxidation and antihydration behavior of fluorine adatoms.

Enhancing the Energy Storage Capabilities of Ti₃C₂T _x MXene Electrodes by Atomic Surface Reduction

Arka Saha , Netanel Shpigel , Rosy , Nicole Leifer , Sarah Taragin , Tali Sharabani , Hagit Aviv , Ilana Perelshtein , Gilbert Daniel Nessim , Malachi Noked , Yury Gogotsi ,

• 2106294
• Version of Record online: 28 September 2021

Atomic surface reduction (ASR)—a new concept for surface functionalization of MXene (Ti₃C₂T _x ) using ALD techniques. The process results in increased interlayer spacing, modified surface terminations, and improvement in electrochemical performances of ASR-MXene in acidic and neutral aqueous electrolytes, as well as in conventional Li-ion and Na-ion organic electrolytes.

Tuning the Volume Phase Transition Temperature of Microgels by Light

• 2107946
• Version of Record online: 28 September 2021

A mechanism of light-triggered reversible switching of the volume phase transition temperature (VPTT) of photo-sensitive microgels consisting of poly-N-isopropyl acrylamide (PNIPAM) and acrylic acid (AAc) of different contents ranging between 1 and 20 mol% is uncovered. VPTT point is reversibly switched by light with a maximal temperature difference of ≈50 °C, that is, between 32° and 82 °C.

Spin-Printing of Liquid Crystal Polymer into Recyclable and Strong All-Fiber Materials

• 2104574
• Version of Record online: 28 September 2021

3D printing of liquid crystal polymers is a powerful technology to manufacture complex-shaped parts with controlled molecular alignment for lightweight, medical, and robotic applications. By implementing a spinning process in a conventional extrusion-based printer, the level of molecular alignment accessible in all-polymer parts is significantly extended, paving the way toward lightweight recyclable structures with unparalleled mechanical stiffness and strength.

High Gain Solution-Processed Carbon-Free BiSI Chalcohalide Thin Film Photodetectors

• 2104788
• Version of Record online: 27 September 2021

Chalcohalides semiconductors are an emergent class of materials for optoelectronics. The hybrid composition of chalcohalides enables access to materials with improved stabilities, common to metal sulfides, but with the processability afforded by metal halides. In this article, bismuth sulfide iodide (BiSI) photodetectors with performances are presented that surpass all other chalcohalide materials reported to date.

Kitkaite NiTeSe, an Ambient-Stable Layered Dirac Semimetal with Low-Energy Type-II Fermions with Application Capabilities in Spintronics and Optoelectronics

Ivana Vobornik , Anan Bari Sarkar , Libo Zhang , Danil W. Boukhvalov , Barun Ghosh , Lesia Piliai , Chia-Nung Kuo , Debashis Mondal , Jun Fujii , Chin Shan Lue , Mykhailo Vorokhta , Huaizhong Xing , Lin Wang , Amit Agarwal , Antonio Politano ,

• 2106101
• Version of Record online: 27 September 2021

Kitkaite (NiTeSe) is an ambient-stable transition-metal dichalcogenide with type-II bulk Dirac fermions around the Fermi level and topological surface states with strong spin polarization. The high potential for optoelectronics is validated by the implementation of ultrasensitive microwave receivers.

3D Visible-Light-Driven Plasmonic Oxide Frameworks Deviated from Liquid Metal Nanodroplets

Manal M. Y. A. Alsaif , Farjana Haque , Turki Alkathiri , Vaishnavi Krishnamurthi , Sumeet Walia , Yihong Hu , Azmira Jannat , Md Mohiuddin , Kai Xu , Muhammad Waqas Khan , Qijie Ma , Yichao Wang , Naresh Pillai , Billy J. Murdoch , Michael D. Dickey , Bao Yue Zhang , Jian Zhen Ou ,

• 2106397
• Version of Record online: 27 September 2021

A liquid metal-based 3D plasmonic oxide framework (POF) is developed, which consists of eutectic EGaIn nanodroplets coated with sub-stoichiometric ultra-thin hexagonal MoO_{3– x} . The POF shows a broadband surface plasmon resonance across the visible and near-infrared region. Together with the ultra-high surface active area, the 3D POF demonstrates excellent performances in chemical sensing, photocatalytic, and optoelectronic applications.

Construction of Polyoxometalate-Based Material for Eliminating Multiple Pb-Based Defects and Enhancing Thermal Stability of Perovskite Solar Cells

Wei Wang , Jian Zhang , Kaifeng Lin , Yayu Dong , Jiaqi Wang , Boyuan Hu , Jiao Li , Zhe Shi , Yanjing Hu , Wei Cao , Debin Xia , Ruiqing Fan , Yulin Yang ,

• 2105884
• Version of Record online: 27 September 2021

A polyoxometalate-based material CoW₁₂@MIL-101(Cr) is applied as an effective dopant to eliminate Pb⁰, passivate Pb²⁺ defects, and speeds up the volatilization of organic solvents during the crystallization of perovskite, resulting in a uniform and dense perovskite film. The doped device obtains an enhanced power conversion efficiency of 21.39% and excellent humid and thermal stability.

Sustained Antitumor Immunity Based on Persistent Luminescence Nanoparticles for Cancer Immunotherapy

• 2106884
• Version of Record online: 27 September 2021

Cancer immunotherapy aims to initiate or reinitiate the tumor-immunity cycle, enabling it to amplify and proliferate, but in a controlled manner. Here, a novel targeted nano-immunostimulant ZGS-Si-Pc@HA, elicits an enduring tumor-specific immune response for the effective suppression of both primary and distant tumors, and finally induces a durable immune memory effect against tumor rechallenging.

Strategic Engineering of Sub-5 nm Dyes@CDs Nanoassemblies Platform for Super Resolution Imaging

• 2106516
• Version of Record online: 27 September 2021

Four kinds of GFP-like supramolecular nanoassemblies are constructed in a very facile manner by the host–guest interaction between isopercolic acid derivatives and cyclodextrin. The cyclodextrins (CD)-based SNAs with small-size, good biocompatibility, high water solubility, and fluorescence quantum yield have potential technological applications in super-resolution imaging.

Materials Informatics Reveals Unexplored Structure Space in Cuprate Superconductors

• 2104696
• Version of Record online: 24 September 2021

The apical and in-plane copper-oxygen distances play an important role in controlling superconductivity in cuprates. Combining high and low resolution data about the structures of cuprates using materials informatics shows that large regions of materials space are yet to be explored. Emerging nano-engineering techniques show promise for exploring this space and improving Tc.

Self-Powered Organic Photodetectors with High Detectivity for Near Infrared Light Detection Enabled by Dark Current Reduction

Yanan Wei , Hao Chen , Tianhua Liu , Song Wang , Yihang Jiang , Yu Song , Jianqi Zhang , Xin Zhang , Guanghao Lu , Fei Huang , Zhixiang Wei , Hui Huang ,

• 2106326
• Version of Record online: 24 September 2021

The organic photodetectors with a vertical phase segregation structure is fabricated using a eco-friendly solvents protection method. The detectivity for near infrared light detection enabled by significant dark current reduction is improved via adjusting injection barrier Φ_b.

Dislocations Stabilized by Point Defects Increase Brittleness in PbTe

• 2108006
• Version of Record online: 24 September 2021

High concentrations of crystalline point defects and dislocations limit plasticity and increase brittleness in some of the highest efficiency PbTe thermoelectric materials through microscopy and mechanical testing. The need for a balance between mechanical and thermoelectric properties when subjecting PbTe to extensive defect engineering is highlighted.

Advanced Electron Energy Loss Spectroscopy for Battery Studies

Zu-Wei Yin , Wenguang Zhao , Jianyuan Li , Xin-Xing Peng , Cong Lin , Mingjian Zhang , Zhiyuan Zeng , Hong-Gang Liao , Haibiao Chen , Hai Lin , Feng Pan ,

• 2107190
• Version of Record online: 24 September 2021

Electron energy loss spectroscopy (EELS) can reveal an abundance of material chemical information, which has promoted battery research in various aspects. A brief EELS introduction is provided here, and then some recent progress in studying the battery materials using EELS is summarized. Finally, a perspective on future battery studies using EELS is described.

Biomimetic Tendrils by Four Dimensional Printing Bimorph Springs with Torsion and Contraction Properties Based on Bio-Compatible Graphene/Silk Fibroin and Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate)

Carmelo De Maria , Irene Chiesa , Davide Morselli , Maria Rachele Ceccarini , Silvia Bittolo Bon , Micaela Degli Esposti , Paola Fabbri , Antonino Morabito , Tommaso Beccari , Luca Valentini ,

• 2105665
• Version of Record online: 24 September 2021

Artificial tendril-like bimorph structures are obtained by 4D printing exhibiting torsion and contractive actuation properties. This integrative design of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and regenerated silk bio-compatible materials shows a combination of actuation capability that is applied to lengthen a phantom intestine. These findings can inspire novel design of biocompatible actuators and enable their exploitation in regenerative medicine.

Heterogeneous Fluorescent Organohydrogel Enables Dynamic Anti-Counterfeiting

• 2108365
• Version of Record online: 24 September 2021

Intelligent fluorescent patterns can response to external stimuli showing high security level in the field of anti-counterfeiting, but still lacking of continuous color variation. Owning to unique heterostructure, fluorescent organohydrogel p(DMA-DEAN)/p(SMA-SPMA), exhibiting dynamic fluorescence change due to the FRET process between DEAN and photo-isomerized SPMA (MCMA) under UV irradiation, is fabricated as an effective platform for the encryption and decryption of secret information.

Anisotropic Properties of Quasi-1D In₄Se₃: Mechanical Exfoliation, Electronic Transport, and Polarization-Dependent Photoresponse

Nataliia S. Vorobeva , Alexey Lipatov , Angel Torres , Jun Dai , Jehad Abourahma , Duy Le , Archit Dhingra , Simeon J. Gilbert , Pavlo V. Galiy , Taras M. Nenchuk , Dmitry S. Muratov , Talat S. Rahman , Xiao Cheng Zeng , Peter A. Dowben , Alexander Sinitskii ,

• 2106459
• Version of Record online: 24 September 2021

In₄Se₃, a highly anisotropic ionic compound, can be mechanically exfoliated into few-nanometer-thick flakes that exhibit field-effect electron mobilities of about 50 cm² V⁻¹ s⁻¹ at room temperature and a visible range photoresponse on a timescale of less than 30 ms, which shows a dependence on the polarization of the excitation light.

Wet Chemistry Vitrification and Metal-to-Semiconductor Transition of 2D Gray Arsenene Nanoflakes

Yi Hu , Xinzhu Wang , Zhenghang Qi , Susu Wan , Junchuan Liang , Qingqing Jia , Daocheng Hong , Yuxi Tian , Jing Ma , Zuoxiu Tie , Zhong Jin ,

• 2106529
• Version of Record online: 24 September 2021

A wet chemistry vitrification method is proposed to controllably transform semimetallic gray arsenene nanoflakes into semiconducting vitreous arsenene nanoflakes. Experimental studies and theoretical simulations reveal that the vitrification is attributed to the consumption of arsenic atoms by aqueous HF solution triggered by dissolved oxygen, forming atomic structure disorderliness and arsenic atom defects/vacancies.

3D Confinement Regulates Cell Life and Death

• 2104098
• Version of Record online: 24 September 2021

An engineered microniche platform is used to culture individual cells in fully enclosed microenvironments under varying extents of 3D confinement. The extent of 3D confinement affects cell viability and proliferation. Confinement effects are mediated via mechanosensitive pathways, including YAP/TAZ signaling, F-actin accumulation, and nuclear sphericity. This study provides new insight in to the understanding of confinement mechanobiology.

Liquid Droplet Stamp Transfer Printing

• 2105407
• Version of Record online: 24 September 2021

A liquid droplet stamp transfer printing (LSTP) is presented for flexible devices. The liquid droplet stamp is designed as a cunning tool to transfer thinned flexible chips. A new method to fabricate a three-dimensional (3D) antenna is proposed as well. Consequently, the LSTP has great potential for system-level flexible devices transfer printing and 3D flexible electronic.

Engineering of a Hollow-Structured Cu_{2− X} S Nano-Homojunction Platform for Near Infrared-Triggered Infected Wound Healing and Cancer Therapy

• 2106700
• Version of Record online: 23 September 2021

The authors developed Cu_{2− X} S nano-homojunctions (nano-HJs) present the multipurpose tumor photo-chemo therapy/anti-infection/wound healing capacities, which have outstanding bactericidal property through synergistic photothermal/photodynamic effects/glutathione depletion. Additionally, after doxorubicin loading, the nano-HJs display boosted tumor-killing efficacy. The functionalized nanoplatform in this paper may open up a new research direction for the biomedical application of homojunction in the future.

Energy Storing Plant Stem with Cytocompatibility for Supercapacitor Electrode

• 2106787
• Version of Record online: 23 September 2021

A novel energy storing plant stem and its usability as a supercapacitor electrode is reported. The plant stem directs the interfacial assembly of a conformal polyaniline coating that renders electroactivity to the plant stem, which can be employed as a functional supercapacitor electrode. Furthermore, this plant electrode demonstrates excellent cytocompatibility and cycling stability.

Hemin-Doped, Ionically Crosslinked Silicone Elastomers with Peroxidase-Like Reactivity

• 2105453
• Version of Record online: 23 September 2021

Silicone elastomers, ionically crosslinked by hemin, are introduced. Elastomers are formed in a straightforward procedure that requires no synthetic modification of hemin. Once made, the elastomers exhibit peroxidase activity that is attributed to the iron center of hemin. The activity of the elastomers can be controlled by simply varying the ratio of amine utilized in the formulation.

Resistive Switching by Percolative Conducting Filaments in Organometal Perovskite Unipolar Memory Devices Analyzed Using Current Noise Spectra

Heebeom Ahn , Keehoon Kang , Younggul Song , Woocheol Lee , Jae-Keun Kim , Junwoo Kim , Jonghoon Lee , Kyeong-Yoon Baek , Jiwon Shin , Hyungbin Lim , Yongjin Kim , Jae Sung Lee , Takhee Lee ,

• 2107727
• Version of Record online: 23 September 2021

The resistive switching properties of organometal perovskite resistive memory devices are analyzed with current noise characteristics. Through a percolation model of current paths, the scaling behavior of noise signals is correlated with conducting filaments having a particular structure with a fractal dimension, enhancing the understanding of resistive memory operation in perovskite materials.

Large-Diameter Carbon Nanotube Transparent Conductor Overcoming Performance–Yield Tradeoff

Qiang Zhang , Jeong-Seok Nam , Jiye Han , Sukanta Datta , Nan Wei , Er-Xiong Ding , Aqeel Hussain , Saeed Ahmad , Viera Skakalova , Abu Taher Khan , Yong-Ping Liao , Mohammad Tavakkoli , Bo Peng , Kimmo Mustonen , Dawoon Kim , In Chung , Shigeo Maruyama , Hua Jiang , Il Jeon , Esko I. Kauppinen ,

• 2103397
• Version of Record online: 23 September 2021

The transparent conductive film (TCF) of carbon nanotubes with large diameters of ≈4 nm and the applications in perovskite solar cells is reported. The TCF performance here aligns with the best-performing TCFs of carbon nanotubes reported to date, showing a production yield greater than two orders of magnitude, which benefits from the large tube diameter.

ROS-Catalytic Transition-Metal-Based Enzymatic Nanoagents for Tumor and Bacterial Eradication

Ling Li , Lijian Cao , Xi Xiang , Xizheng Wu , Lang Ma , Fan Chen , Sujiao Cao , Chong Cheng , Dawei Deng , Li Qiu ,

• 2107530
• Version of Record online: 23 September 2021

Recent advancements in transition-metal-based enzymatic nanoagents for reactive oxygen species (ROS) generation have been summarized here. The mechanisms and the key factors to enhance ROS level, analytic methods, rational design, antitumor and antibacterial applications, and primary challenges and future perspectives are carefully outlined, which will offer a cutting-edge understanding and guidance for the future design of ROS-catalytic nanostructures.

Glucose Detection Devices and Methods Based on Metal–Organic Frameworks and Related Materials

• 2106023
• Version of Record online: 23 September 2021

The use of metal–organic frameworks (MOFs) for the construction of various types of glucose sensors is summarized. Enzymatic, nonenzymatic, wearable, and flexible sensing devices and methods are considered. The synthesis of MOFs, the working principles of the different transduction-based glucose sensors, current challenges and future perspectives of MOFs and their related materials-based-glucose sensors are also highlighted.

Visualizing Thermally Activated Memristive Switching in Percolating Networks of Solution-Processed 2D Semiconductors

Vinod K. Sangwan , Sonal V. Rangnekar , Joohoon Kang , Jianan Shen , Hong-Sub Lee , David Lam , Junhua Shen , Xiaolong Liu , Ana C. M. de Moraes , Lidia Kuo , Jie Gu , Haihua Wang , Mark C. Hersam ,

• 2107385
• Version of Record online: 23 September 2021

In situ visualization and chemical analysis of memristive devices based on solution-processed 2D semiconductors reveal switching mechanisms and filament formation. Intrinsic resistive switching in percolating films originates from thermally activated electrical discharge at nanosheet edges, resulting in characteristics that are promising for artificial neurons in neuromorphic computing.

Size Effects in Sodium Ion Batteries

• 2106047
• Version of Record online: 23 September 2021

In this review, the size effects and their influences on electrodes (the kinetics, thermodynamics and sodium storage mechanisms) and electrolytes (the liquid electrolytes, polymer electrolytes and solid-state inorganic electrolytes) in sodium ion batteries are summarized and discussed systematically.

Photocurable 3D Printing of High Toughness and Self-Healing Hydrogels for Customized Wearable Flexible Sensors

• 2107202
• Version of Record online: 23 September 2021

This study proposes a universal photocuring 3D printing hydrogel strategy, focusing on the fabrication of hydrogels with high toughness and self-healing ability for application in wearable sensors. An interpenetrated network hydrogel based on non-covalent interactions is first designed to form physical cross-links instead of the conventional covalent bonds to ensure printability of photocuring 3D printing.

TiO₂/MXene-Assisted LDI-MS for Urine Metabolic Profiling in Urinary Disease

• 2106743
• Version of Record online: 23 September 2021

By using the TiO₂/MXene-assisted laser desorption/ionization mass spectrometry, rapid screening of metabolic change in urinary disease is realized. The paradigm presented here can in principle be used for most biofluid samples. The combination of machine learning advances the understanding of urine metabolic fingerprints for large-scale screening of disease. This approach paves the way for the early diagnosis of urinary cancers from nonmalignant diseases.

Josephson Plasmon Resonance in Tl₂Ba₂CaCu₂O₈ High-Temperature Superconductor Tunable Terahertz Metamaterials

Rong Guo , Siyu Duan , Ze He , Xuelian Liang , Zihan Niu , Ming He , Yushun Jiang , Jingbo Wu , Lu Ji , Biaobing Jin , Jian Chen , Huabing Wang , Peiheng Wu ,

• 2106891
• Version of Record online: 23 September 2021

The Josephson plasmon resonance (JPR) is observed in high temperature superconductor Tl-2212 metamaterial. This metamaterial offers an intriguing way to couple the JPR with free space radiation and probe the superconducting carriers in the layered superconductor. With the introduction of Josephson plasmons into metamaterials, the tuning and nonlinear properties can be exploited to develop various functional devices.

Building a Library for Catalysts Research Using High-Throughput Approaches

• 2107862
• Version of Record online: 23 September 2021

High-throughput (HT) methods lead to efficient discovery and optimization of catalysts in a short period. The key processes of HT technologies for building a catalysts library based on informatics tools and experiments that include HT synthesis and characterizations are highlighted. Moreover, the correlation between computational and experimental datasets is discussed to provide insight into the development of HT techniques for catalysts research.

Efficient and Stable Quasi-2D Perovskite Solar Cells Enabled by Thermal-Aged Precursor Solution

Xing Li , Kang Li , Boxin Wang , Xuning Zhang , Shengli Yue , Yanxun Li , Qian Chen , Shilin Li , Tong Yue , Huiqiong Zhou , Yuan Zhang ,

• 2107675
• Version of Record online: 22 September 2021

Thermal-aged precursor solution (TAPS) featuring the aggregated colloidal clusters with fewer nucleation sites is applied to fabricate high-quality quasi-2D perovskite films, through which a record-high V _OC of 1.24 V is achieved in (AA)₂MA₄Pb₅I₁₆-based quasi-2D perovskite solar cells, leading to a champion efficiency of 18.68%.

Wide Bandgap Polymer with Narrow Photon Harvesting in Visible Light Range Enables Efficient Semitransparent Organic Photovoltaics

Chunyu Xu , Ke Jin , Zuo Xiao , Zijin Zhao , Xiaoling Ma , Xuelin Wang , Junming Li , Wenjing Xu , Shuping Zhang , Liming Ding , Fujun Zhang ,

• 2107934
• Version of Record online: 21 September 2021

A power conversion efficiency of 12.91% and an average visible transmittance of 22.49% are achieved in semitransparent organic photovoltaics (OPVs) with D18:N3 (0.7:1.6, wt/wt) as active layers. This work demonstrates that the wide bandgap polymer donor with narrow photon harvesting in the visible light range has great potential in preparing efficient semitransparent OPVs.

3D Printing of Hydrogels for Stretchable Ionotronic Devices

• 2107437
• Version of Record online: 21 September 2021

Hydrogel ionotronics prepared by 3D printing have received intensive attention due to the combination of high biocompatibility, stimuli-responsiveness, rapid prototyping, and delicated patterns. Herein, recent advances of 3D printed hydrogel devices are reviewed, highlighting strategies to enhance printing quality (printability, resolution, and shape fidelity), properties (elastic conductivity, and self-healing ability), and performances of various ionotronic devices.

Low-Work-Function PEDOT Formula as a Stable Interlayer and Cathode for Organic Solar Cells

Tiefeng Liu , Lulu Sun , Xinyun Dong , Youyu Jiang , Wen Wang , Cong Xie , Wenwu Zeng , Yang Liu , Fei Qin , Lu Hu , Yinhua Zhou ,

• 2107250
• Version of Record online: 21 September 2021

A bulky low-work function (low-WF, 4.1 eV) PEDOT:PSS-TBA is presented via ion exchange. Superior to other low-WF materials, the PEDOT:PSS-TBA is stable under oxygen plasma, heat, or isopropanol sonication. By combining the low-WF PEDOT:PSS-TBA and high-WF PEDOT:PSS as cathode and anode, respectively, as a proof of concept, organic solar cells with a three-layered structure (PEDOT:PSS-TBA/PM6:IT-4F/PEDOT:PSS) are demonstrated.

Intertube Excitonic Coupling in Nanotube Van der Waals Heterostructures

Maria G. Burdanova , Ming Liu , Michael Staniforth , Yongjia Zheng , Rong Xiang , Shohei Chiashi , Anton Anisimov , Esko I. Kauppinen , Shigeo Maruyama , James Lloyd-Hughes ,

• 2104969
• Version of Record online: 21 September 2021

Ultrafast infrared pump visible probe spectroscopy demonstrates the existence of intertube excitons and biexcitons in 1D van der Waals heterostructures built from nanotubes. Intertube exciton–exciton coupling is found to be fast and to persist within the coherent regime, when excitons in the carbon nanotubes are polarized. Charge transfer to the MoS₂ nanotubes is slower, taking hundreds of picoseconds.

Dopant-Free Hole Transport Materials Based on a Large Conjugated Electron-Deficient Core for Efficient Perovskite Solar Cells

Jiefeng Hai , Hao Wu , Xinxing Yin , Jiaxing Song , Lin Hu , Yingzhi Jin , Ling Li , Zhen Su , Zhiguang Xu , Hao Wang , Zaifang Li ,

• 2105458
• Version of Record online: 21 September 2021

Two novel dopant-free hole transport materials (HTMs) named Y6-T and Y-T with a large conjugated electron-deficient core are developed for efficient perovskite solar cells. The champion power conversion efficiency (PCE) reaches 20.29% for Y-T-based device. The Y-T-based devices without encapsulation retain over 90% of the initial PCE in air with a relative humidity around 30% after storing for 60 days.

Recent Progress on Metal-Based Nanomaterials: Fabrications, Optical Properties, and Applications in Ultrafast Photonics

Bo Fu , Jingxuan Sun , Yuan Cheng , Hao Ouyang , Giuseppe Compagnini , Peng Yin , Songrui Wei , Shaojuan Li , Dabing Li , Vittorio Scardaci , Han Zhang ,

• 2107363
• Version of Record online: 20 September 2021

Metal-based nanomaterials gradually come into the sight of ultrafast photonics due to the outstanding optical properties. The state of the art of metal-based nanomaterials in fabrications, optical properties, and applications as saturable absorbers are summarized in this review, aiming to accelerate the exploration of nanomaterials and further stimulate the applications in various fields.

Perovskite Origami for Programmable Microtube Lasing

Haiyun Dong , Christian Niclaas Saggau , Minshen Zhu , Jie Liang , Shengkai Duan , Xiaoyu Wang , Hongmei Tang , Yin Yin , Xiaoxia Wang , Jiawei Wang , Chunhuan Zhang , Yong Sheng Zhao , Libo Ma , Oliver G. Schmidt ,

• 2109080
• Version of Record online: 19 September 2021

A perovskite origami strategy is developed to assemble 3D perovskite microarchitectures. With high design flexibility, self-assembled 3D perovskite microtube architectures support both superior laser performance (e.g., low threshold, directional emission, tunable output, and high stability) and novel laser functionalities (e.g., laser array-in-array emission and 3D mode lasing). The programmable perovskite micro-origami takes perovskite optoelectronics and photonics into a 3D era.

Radial Pores in Nitrogen/Oxygen Dual-Doped Carbon Nanospheres Anode Boost High-Power and Ultrastable Potassium-Ion Batteries

Hongli Deng , Lei Wang , Shengyang Li , Meng Zhang , Tao Wang , Jian Zhou , Maoxin Chen , Song Chen , Jinhui Cao , Qiusheng Zhang , Jian Zhu , Bingan Lu ,

• 2107246
• Version of Record online: 19 September 2021

A radial channel is constructed, and in situ nitrogen/oxygen doping in carbon nanospheres is introduced to assemble a high power density and ultralong cycling life potassium-ion full battery anode. The hierarchical channels and N,O dual-doping can significantly shorten ions conveyance pathway and highly accelerate the electrons conduction, which are availed to the kinetics of electrode reactions.

Low-Dimensional Black Phosphorus in Sensor Applications: Advances and Challenges

• 2106484
• Version of Record online: 19 September 2021

Low-dimensional black phosphorus (LDBP) opens up new opportunities for sensors development. An overview of LDBP for detection with focus on the structure, properties, protection strategies, preparation methods is presented. Furthermore, the relationship between the characteristics and sensing performance, along with recent progress on various LDBP-based sensors are elaborated. Finally, the limitations and challenges are discussed.

Regulating Intercalation of Layered Compounds for Electrochemical Energy Storage and Electrocatalysis

• 2104543
• Version of Record online: 19 September 2021

This review systematically discusses the intercalation mechanism and method of guest species into layered materials, highlights their recent application such as lithium ion batteries, sodium ion batteries, aqueous zinc batteries, supercapacitors, hydrogen evolution reaction and oxygen evolution reaction, and emphasizes the strategies to enhance their properties and fundamental issues of the intercalated layered materials.

Perovskite Anion Exchange: A Microdynamics Model and a Polar Adsorption Strategy for Precise Control of Luminescence Color

Yihui Zhou , Tao Fang , Gaoyu Liu , Hengyang Xiang , Linxiang Yang , Yan Li , Run Wang , Danni Yan , Yuhui Dong , Bo Cai , Haibo Zeng ,

• 2106871
• Version of Record online: 19 September 2021

The microscopic mechanism of anion exchange is explored. Besides, a method of using polar solvents to construct in situ exchange channels is proposed. By reducing the energy barrier of anion exfoliation on the surface of perovskite quantum dots, precise control of anion exchange results is achieved, and efficient and stable light-emitting diodes are constructed.

Side-Chain Engineering of Aggregation-Induced Emission Molecules for Boosting Cancer Phototheranostics

Shanliang Song , Yue Zhao , Miaomiao Kang , Zhijun Zhang , Qian Wu , Shuang Fu , Youmei Li , Haifei Wen , Dong Wang , Ben Zhong Tang ,

• 2107545
• Version of Record online: 18 September 2021

An aggregation-induced emission-active multifunctional phototheranostic system is reported through intentional control of the side-chain structure. Bearing the longest alkyl chain, all of those three energy dissipation pathways are retained controllably. In vitro and in vivo evaluations verify that TBFT2 nanoparticles perform well in terms of fluorescence imaging-guided photodynamic and photothermal therapy synergistic cancer therapy.

Modular Type III Porous Liquids Based on Porous Organic Cage Microparticles

• 2106116
• Version of Record online: 18 September 2021

Porous liquids consisting of porous organic cage (POC) microparticles dispersed in size-excluded oils and ionic liquids are formed. The flexible pairing between POC microparticles of different compositions and carrier liquid allows colloidally stable porous liquids to be produced with relatively low viscosities or high thermal stability. These systems exhibit enhanced CO₂ and CH₄ absorption, and can undergo pressure-swing and temperature-swing cycles.

Optimized Cathode for High-Energy Sodium-Ion Based Dual-Ion Full Battery with Fast Kinetics

• 2107830
• Version of Record online: 17 September 2021

The protonated states may influence the net charge, and thus, PANI doping states could be adjusted by changing the nitrogen atoms along the conjugated backbone. The optimized protonated polyaniline cathode in this work possesses relative high properties for ClO₄ ⁻ storage, which may boost the exploitation and provide guidelines for next-generation high-energy/power density dual-ion full batteries in the future.

PEDOT:PSS-Free Polymer Non-Fullerene Polymer Solar Cells with Efficiency up to 18.60% Employing a Binary-Solvent-Chlorinated ITO Anode

Rui Sun , Tao Wang , Yao Wu , Meng Zhang , Yunlong Ma , Zuo Xiao , Guanghao Lu , Liming Ding , Qingdong Zheng , Christoph J. Brabec , Yongfang Li , Jie Min ,

• 2106846
• Version of Record online: 17 September 2021

A poly(3,4-ethylenedioxythiophene):poly-(styrenesulfonate) (PEDOT:PSS)-free organic solar cell (OSC) architecture is successfully constructed by employing a binary solvent-chlorinated indium tin oxide anode, which can simultaneously improve the device performance and operational stability of non-fullerene OSCs.

Tracking Twin Boundary Jerky Motion at Nanometer and Microsecond Scales

• 2106573
• Version of Record online: 17 September 2021

A developed magnetic-emission-based experimental procedure enables measuring nanometer scale volumes that undergo a twinning transformation during a multitude of discrete and impulsive events, which occur at the microsecond scale. Based on the obtained experimental results, a unified description of the nature of twin boundary motion at both slow and high rates is proposed.

Porous Pd/NiFeO_x Nanosheets Enhance the pH-Universal Overall Water Splitting

• 2107181
• Version of Record online: 17 September 2021

The bifunctional electrocatalysts of Pd/NiFeO_x with tightly arranged petal nanosheets and uniform mesoporous structure on nickel foam are synthesized, which exhibit a superior activity and durability for overall water splitting in all pH values due to the larger surface area and exposes more active sites.

Revisiting the Chemical Stability of Germanium Selenide (GeSe) and the Origin of its Photocatalytic Efficiency

Danil W. Boukhvalov , Silvia Nappini , Mykhailo Vorokhta , Tevfik Onur Menteş , Lesia Piliai , Mohammad Panahi , Francesca Genuzio , Jessica De Santis , Chia-Nung Kuo , Chin Shan Lue , Valentina Paolucci , Andrea Locatelli , Federica Bondino , Antonio Politano ,

• 2106228
• Version of Record online: 17 September 2021

The formation of a surface oxide skin on GeSe crystals plays a key role in the physicochemical mechanisms ruling photoelectrocatalysis: the underlying van der Waals semiconductor provides electron–hole pairs, while the germanium-oxide skin formed upon oxidation affords the active sites for catalytic reactions.

Chromium-Based Metal–Organic Framework as A-Site Cation in CsPbI₂Br Perovskite Solar Cells

• 2106233
• Version of Record online: 17 September 2021

Incorporation of the chromium-based metal–organic framework as A-site cation allows realizing a new multiple-dimensional electronically coupled CsPbI₂Br perovskite, which is theoretically and experimentally proved to improve the carrier transport ability and stability of perovskite solar cells (PSCs). Consequently, the as-fabricated CsPbI₂Br PSCs demonstrate 17.02% power conversion efficiency while superior long-term stability.

Multistate Tuning of Third Harmonic Generation in Fano-Resonant Hybrid Dielectric Metasurfaces

• 2104627
• Version of Record online: 17 September 2021

Multistate tuning of third-harmonic generation via hybrid nonlinear metasurfaces is demonstrated. The metasurfaces consisting of GST–silicon split ring resonators offer a large third-order nonlinearity in the visible range. A high Q-factor Fano resonance of up to ≈125 is experimentally achieved together with a third-harmonic conversion efficiency of 2.9 × 10⁻⁶% at a peak pump density of 1.7 GW cm⁻².

Graphene Oxide Encapsulating Liquid Metal to Toughen Hydrogel

Yijie Hu , Hao Zhuo , Yu Zhang , Haihong Lai , Jiwang Yi , Zehong Chen , Xinwen Peng , Xiaohui Wang , Chuanfu Liu , Runcang Sun , Linxin Zhong ,

• 2106761
• Version of Record online: 17 September 2021

This work solves the phase-separation of liquid metal (LM) in hydrogels and provides a general strategy for fabricating tough, notch-insensitive, and adhesive LM hydrogels by encapsulating LM with graphene oxide nanosheets. The encapsulating endows LM droplets with stable shells and strong interaction within polymer matrix, which prevents them from fracture and exudation to polymer network.

Emulsion-Templated Poly(N-Isopropylacrylamide) Shells Formed by Thermo-Enhanced Interfacial Complexation

• 2105490
• Version of Record online: 17 September 2021

Interfacial complexation between poly(L-lysine)-g-poly(N-isopropylacrylamide) and a perfluoro-surfactant is implemented in water-in-oil emulsions. The thermoresponsiveness of poly(N-isopropylacrylamide) strands is used to trigger a massive clustering of polymer chains at the droplets' surface upon gentle heating. This thermo-enhancement of conventional interfacial complexation enables straightforward formation of polymer capsules that can integrate nanoparticles in the polymer shell or proteins in the aqueous core.

Stabilization of Zn Metal Anode through Surface Reconstruction of a Cerium-Based Conversion Film

• 2103227
• Version of Record online: 17 September 2021

A uniform and compact cerium-based conversion film is constructed on Zn metal anode through a facile chemical conversion method, which can effectively prevent Zn metal from severe corrosion and dendritic Zn deposition. Higher specific capacity and better cycling stability can be achieved for symmetrical cells and full cells with this kind of Zn metal anode.

Faster Diffusion of Oxygen Along Dislocations in (La,Sr)MnO_3+δ Is a Space-Charge Phenomenon

• 2105647
• Version of Record online: 17 September 2021

A judicious combination of experimental and computational methods is used to identify the origin of faster oxygen diffusion along dislocations in the perovskite-oxide (La,Sr)MnO_3+δ. Taken together, the results from ¹⁸O diffusion experiments and molecular dynamics simulations indicate that faster diffusion cannot occur along the structural core of the dislocations but rather along enveloping space-charge tubes.

Defect Passivation in Air-Stable Tin(IV)-Halide Single Crystal for Emissive Self-Trapped Excitons

• 2108561
• Version of Record online: 17 September 2021

Highly stable hybrid Sn⁴⁺-based (C₈H₂₂N₂Cl)₂SnCl₆ crystals are successfully synthesized. Their photoluminescence performance can be significantly boosted due to the passivation of defect states together with the formation of radiative self-trapped states, by incorporating metal ions with active ns² lone pairs. This work suggests a new avenue to manipulate the materials' photophysical properties by incorporating ions with active ns² electrons.

High-Lithiophilicity Host with Micro/Nanostructured Active Sites based on Wenzel Wetting Model for Dendrite-Free Lithium Metal Anodes

Yang Mei , Jiahui Zhou , Yutong Hao , Xin Hu , Jiao Lin , Yongxin Huang , Li Li , Changgen Feng , Feng Wu , Renjie Chen ,

• 2106676
• Version of Record online: 16 September 2021

A hierarchical carbon nanotube (CNT) @ NiO framework is constructed to improve the lithiophilicity and stabilize the lithium metal anode combining chemical optimization and architecture building. The high conductive CNT sponge and the lithiophilic micro-nanostructured NiO spheres with nano-sized protuberances over the surface synergistically promote the uniform Li⁺ deposition. Finally, the electrochemical performance of lithium metal battery using the CNT@NiO host is effectively improved.

Graphene-Based Technologies for Tackling COVID-19 and Future Pandemics

• 2107407
• Version of Record online: 16 September 2021

The COVID-19 pandemic highlighted the need for rapid tools and technologies to combat highly infectious viruses. The excellent electrical, mechanical, and other functional properties of graphene and graphene-like 2D materials (2DM) can be utilized to develop novel and innovative devices to tackle COVID-19 and future pandemics. Here, the authors outline how graphene and other 2DM-based technologies can be used for the detection, protection and continuous monitoring of infectious diseases including COVID-19.

Molecular Engineering to Tune the Ligand Environment of Atomically Dispersed Nickel for Efficient Alcohol Electrochemical Oxidation

Zhifu Liang , Daochuan Jiang , Xiang Wang , Mohsen Shakouri , Ting Zhang , Zhongjun Li , Pengyi Tang , Jordi Llorca , Lijia Liu , Yupeng Yuan , Marc Heggen , Rafal E. Dunin-Borkowski , Joan R. Morante , Andreu Cabot , Jordi Arbiol ,

• 2106349
• Version of Record online: 16 September 2021

The ligand coordination environment of nickel ion centers in a nickel-based 2D organic framework is tuned by introducing carbonyl (CO) groups to decisively contribute to an efficient alcohol electro-oxidation in alkaline solution. The new catalyst display outstanding performance toward the oxidation of methanol, ethanol, and benzyl alcohol.

Enhancing Performance and Stability of Tin Halide Perovskite Light Emitting Diodes via Coordination Engineering of Lewis Acid–Base Adducts

Ye Jin Heo , Ho Jin Jang , Joo-Hong Lee , Sae Byeok Jo , Seonkwon Kim , Dong Hae Ho , Seok Joon Kwon , Kyusun Kim , Il Jeon , Jae-Min Myoung , Jun Yeob Lee , Jin-Wook Lee , Jeong Ho Cho ,

• 2106974
• Version of Record online: 16 September 2021

By adopting Lewis bases with varying coordinating ability, interplays between the coordinating ability of the Lewis base and tin halide perovskite film quality is unraveled. The strongly coordinating N,N′-dimethylpropyleneurea suppresses oxidation of Sn²⁺ in the precursor solution while promoting growth of uniform and highly crystalline Sn perovskite thin films for achieving high-performance lead-free perovskite light emitting diodes.

Low-Temperature Solution-Processed Transparent QLED Using Inorganic Metal Oxide Carrier Transport Layers

• 2106387
• Version of Record online: 15 September 2021

In this paper, a transparent solution-processed inorganic QLED device is fabricated. The low-temperature sol-gel derived copper doped nickel oxide interlayer improves the hole injection efficiency, reducing the QLED turn-on voltage. In addition, the modeling and simulation of QLED are completed in COMSOL, where the simulation results show good accordance with the experimental results and theoretical analysis.

Anomalous Dimensionality-Driven Phase Transition of MoTe₂ in Van der Waals Heterostructure

Huije Ryu , Yangjin Lee , Hyun-Jung Kim , Seoung-Hun Kang , Yoongu Kang , Kangwon Kim , Jungcheol Kim , Blanka E. Janicek , Kenji Watanabe , Takashi Taniguchi , Pinshane Y. Huang , Hyeonsik Cheong , In-Ho Jung , Kwanpyo Kim , Young-Woo Son , Gwan-Hyoung Lee ,

• 2107376
• Version of Record online: 15 September 2021

Dimensionality-driven anomalous phase transition of MoTe₂ is demonstrated. The thinner MoTe₂ has a higher 2H-to-T_d phase transition temperature with distinct temperature differences. Vertical and lateral phase-patterning is achieved by modulating the thickness via stacking and insertion of graphene. By using dimensionality-driven phase transition, seamless T_d contacts for 2H-MoTe₂ transistors are fabricated, leading to low contact resistance and high mobility.

Nitrogen Vacancy Induced Coordinative Reconstruction of Single-Atom Ni Catalyst for Efficient Electrochemical CO₂ Reduction

Chen Jia , Shunning Li , Yong Zhao , Rosalie K. Hocking , Wenhao Ren , Xianjue Chen , Zhen Su , Wanfeng Yang , Yuan Wang , Shisheng Zheng , Feng Pan , Chuan Zhao ,

• 2107072
• Version of Record online: 15 September 2021

A nitrogen vacancy (NV) induced coordinative reconstruction is realized, through increasing plasma treating time, to construct a defective and unsaturated Ni-pyridinic N₂ coordination structure with superior CO₂ reduction activity. This local N environment decreases the restraint on central Ni atoms and provides enough space which favors the adsorption and activation of CO₂ molecule, leading to a reduced energy barrier for CO₂ reduction.

Ionic Dopant-Induced Ordering Enhances the Thermoelectric Properties of a Polythiophene-Based Block Copolymer

Ban Xuan Dong , Ziwei Liu , Jonathan W. Onorato , Tengzhou Ma , Joseph Strzalka , Peter Bennington , Christine K. Luscombe , Christopher K. Ober , Paul F. Nealey , Shrayesh N. Patel ,

• 2106991
• Version of Record online: 15 September 2021

The thermoelectric properties of a conjugated block copolymer P3HT-b-POEM are investigated. The introduction of the POEM block enables solution co-processing with an ionic salt, resulting in significant improvement in molecular order of P3HT block. Subsequent doping with F4TCNQ results in a thermoelectric power factor of 13.0 µW m⁻¹ K⁻², which is more than 20 times higher than that of the salt-free P3HT-b-POEM sample.

Low-Cost and Large-Area Hybrid X-Ray Detectors Combining Direct Perovskite Semiconductor and Indirect Scintillator

• 2107843
• Version of Record online: 15 September 2021

Direct semiconductor Cs₂AgBiBr₆ and indirect scintillator (C₃₈H₃₄P₂)MnBr₄ are combined to create a hybrid detector. Both the charges generated by Cs₂AgBiBr₆ and (C₃₈H₃₄P₂)MnBr₄ are collected. (C₃₈H₃₄P₂)MnBr₄ significantly suppresses the ion migration in Cs₂AgBiBr₆ detector, and hybrid detector provides a possibility for the application of scintillators with high efficiency but long afterglow lifetime.

Self-Driving Platform for Metal Nanoparticle Synthesis: Combining Microfluidics and Machine Learning

• 2106725
• Version of Record online: 15 September 2021

A self-driving platform integrating oscillatory microfluidics, online spectroscopy, and machine learning is developed for the autonomous synthesis of metal nanoparticles. The platform employed machine learning to guide the synthesis and analyze the relationship between reaction conditions and nanoparticle properties. The platform successfully identified the most effective reaction conditions for the synthesis of nanoparticles with different spectroscopic characteristics.

Designing Porous Antifouling Interfaces for High-Power Implantable Biofuel Cell

Lie Wang , Er He , Rui Gao , Xiaotong Wu , Anwei Zhou , Jiang Lu , Tiancheng Zhao , Jiaxin Li , Yanjing Yun , Luhe Li , Tingting Ye , Yiding Jiao , Jiacheng Wang , Hao Chen , Dan Li , Xinghai Ning , Di Wu , Huisheng Peng , Ye Zhang ,

• 2107160
• Version of Record online: 15 September 2021

A porous antifouling interface is designed by combining a porous structure, high enzyme immobilization ability, and good antifouling property to produce high-performance biofuel cells in vivo. The resulting implantable biofuel cell can maintain almost 100% performance after implanting in living organism, and a maximal output power of 76.6 mW cm^–3 is achieved in vivo.

Simultaneous Manipulation of Interfacial and Defects Polarization toward Zn/Co Phase and Ion Hybrids for Electromagnetic Wave Absorption

• 2106677
• Version of Record online: 14 September 2021

A kinetic-thermodynamic cocontrol strategy is proposed to construct Zn/Co bimetal hybrids with tuning phase/ion hybridization for the first time. The auxiliary chelating agent triethanolamine and gradient pyrolysis temperature dominate the phase/ion hybridization, respectively, inducing tunable synergistic effect of interfacial/defects polarization. This work provides an inspiration in developing bimetal and even multimetal microwave absorption materials with tunable hybridization structure.

3D Ordered Porous Hybrid of ZnSe/N-doped Carbon with Anomalously High Na⁺ Mobility and Ultrathin Solid Electrolyte Interphase for Sodium-Ion Batteries

Xueying Li , Zhiyuan Han , Wenhua Yang , Qiang Li , Hongsen Li , Jie Xu , Hongliang Li , Bing Liu , Haiguang Zhao , Shandong Li , Xia Wang , Xing-Long Wu ,

• 2106194
• Version of Record online: 14 September 2021

A 3D ordered hierarchical porous ZnSe@N-doped carbon hybrid with higher Na⁺ diffusion kinetics than Li⁺ and K⁺ is fabricated. Originating from architectural advantages and optimization of electrolytes, the hybrid delivers a low diffusion barrier and activation energy of Na⁺, accompanied by the formation of ultrathin solid electrolyte interphase to make it present long cycle life even at 10 A g⁻¹ for sodium-ion batteries.

Engineering Metal Nanoclusters for Targeted Therapeutics: From Targeting Strategies to Therapeutic Applications

• 2105662
• Version of Record online: 14 September 2021

This review first discusses the design principles of targeting strategies for metal nanoclusters and their composites, and then focuses on the application of metal nanoclusters in targeted therapeutics, including chemotherapy, phototherapy, and radiotherapy. Finally, the authors' perspectives on challenges and opportunities of developing metal nanoclusters in targeted therapeutics are provided, further paving the way toward potential clinical applications are provided.

A Dynamically Hybrid Crosslinked Elastomer for Room-Temperature Recyclable Flexible Electronic Devices

• 2106281
• Version of Record online: 14 September 2021

Distinctive Diels–Alder adducts with suitable dissociation and reassociation dynamics are designed as crosslinking units to enable controllable recycling of the resultant elastomer at room temperature without the need for chemical treatment to decompose the polymer chains. Furthermore, the elastomer has other advantages for electronics as well including biomimetic mechanical properties, room-temperature self-healing, and facile processability.

A Highly Tolerant Printing for Scalable and Flexible Perovskite Solar Cells

Zhi Xing , Suyu Lin , Xiangchuan Meng , Ting Hu , Dengxue Li , Baojin Fan , Yongjie Cui , Fengyu Li , Xiaotian Hu , Yiwang Chen ,

• 2107726
• Version of Record online: 14 September 2021

The multi-scale defect repair strategy is developed to fabricate scalable and flexible perovskite solar cells. By inhibiting the aggregation behavior of colloidal particles to avoid pinholes and intergranular cracking in the perovskite film, along with repairing the deep defects at the interface, the target flexible devices (1.01 cm²) deliver a superior efficiency of 18.12% with improved air atmosphere stability.

Exploiting Confinement to Study the Crystallization Pathway of Calcium Sulfate

Clara Anduix-Canto , Mark A. Levenstein , Yi-Yeoun Kim , Jose R. A. Godinho , Alexander N. Kulak , Carlos González Niño , Philip J. Withers , Jonathan P. Wright , Nikil Kapur , Hugo K. Christenson , Fiona C. Meldrum ,

• 2107312
• Version of Record online: 14 September 2021

An imaging-based strategy is described that exploits confinement effects to study crystallization pathways. Crystallization is conducted within nanoporous glass rods and the development of a population of crystals is studied using in situ synchrotron X-ray computed tomography and diffraction tomography. Application to calcium sulfate demonstrates that multiple pathways can operate in parallel during the precipitation of gypsum from aqueous solution.

From Lithium-Metal toward Anode-Free Solid-State Batteries: Current Developments, Issues, and Challenges

• 2106608
• Version of Record online: 13 September 2021

Recent developments in the field of anode-free solid-state batteries (AFSSB) are systematically reviewed, including considerations of energy density, cost, manufacturing, and recyclability. Lessons learned from liquid electrolyte systems are evaluated regarding the transfer to AFSSB. Current developments and major achievements are highlighted. Key challenges, including coulombic efficiency, interfacial issues, dendrite growth, and cell design, are summarized, emphasizing promising solution strategies.

A Shape-Variable, Low-Temperature Liquid Metal–Conductive Polymer Aqueous Secondary Battery

• 2107062
• Version of Record online: 13 September 2021

Deformable liquid metal-conductive polymer aqueous rechargeable batteries are designed to operate at low temperature using a GaInSn alloy anode and a polyaniline cathode. The batteries exhibit excellent electrochemical, cycling, and deformation performance, thus demonstrating wide application prospects as deformable energy devices in both civilian and military fields.

An Aqueous Mg²⁺-Based Dual-Ion Battery with High Power Density

• 2107523
• Version of Record online: 13 September 2021

An aqueous Mg²⁺ dual-ion battery is proposed to show high power density and remarkable cycling stability. This battery chemistry relies on the concentrated electrolytes of Mg(NO₃)₂ featuring water-shared ion pairs. This suppresses not only water activity but also enables a high-rate and stable polyaniline cathode and polyimide anode.

Phase-Transformation-Induced Giant Deformation in Thermoelectric Ag₂Se Semiconductor

Qi Liang , Dongwang Yang , Fanjie Xia , Hui Bai , Haoyang Peng , Ruohan Yu , Yonggao Yan , Danqi He , Shaowen Cao , Gustaaf Van Tendeloo , Guodong Li , Qingjie Zhang , Xinfeng Tang , Jinsong Wu ,

• 2106938
• Version of Record online: 13 September 2021

The SeSe bonds are folded when the Ag⁺-ion vacancies are ordered and become stretched when these vacancies are disordered. Such a stretch/fold of the SeSe bonds enables a fast and large deformation occurring during the phase transition. A new ordered high-temperature phase of α ′-Ag₂Se acts as a buffer to flexibly accommodate the stress caused by the phase transformation.

A Personalized Multifunctional 3D Printed Shape Memory-Displaying, Drug Releasing Tracheal Stent

• 2108436
• Version of Record online: 13 September 2021

Personalized 3D printed, shape memory-displaying tracheal stents based on optimized polypropylene glycol/polycaprolactone crosslinkable inks, are developed. Using the in situ welding strategy, thin layers of the stent are independently printed, sequentially deployed, and then welded together. Different inks are used in the bulk and surface of the stent, further fine-tuning its properties. The printed stents are also rendered with anti-fouling and antimicrobial capabilities.

Synergistic Manipulation of Zn²⁺ Ion Flux and Nucleation Induction Effect Enabled by 3D Hollow SiO₂/TiO₂/Carbon Fiber for Long-Lifespan and Dendrite-Free Zn–Metal Composite Anodes

Pan Xue , Can Guo , Nanyang Wang , Kaiping Zhu , Shuang Jing , Shuo Kong , Xiaojie Zhang , Li Li , Hongpeng Li , Yongbao Feng , Wenbin Gong , Qiulong Li ,

• 2106417
• Version of Record online: 13 September 2021

An effective strategy to construct a 3D porous hollow fiber scaffold with well-dispersed TiO₂, SiO₂, and carbon as the superzincophilic host materials for zinc anodes is reported. The hollow fiber redistributes the Zn²⁺ ion flux, resulting in stable Zn deposition, which allows the composite electrode to demonstrate a long cycle life of over 1500 cycles at 20 mA cm⁻².

Applied Machine Learning for Developing Next-Generation Functional Materials

• 2104195
• Version of Record online: 13 September 2021

This perspective provides a summary of the recent applications of machine learning in material discovery in a range of fields, from optoelectronics to batteries and electrocatalysis, as well as an overview of the methods behind these advances. The paper also summarizes some key challenges and trends in current research methodologies.

0D/1D Heterojunction Implant with Electro-Mechanobiological Coupling Cues Promotes Osteogenesis

Xiao Huang , Jun Xing , Zhengao Wang , Jin Han , Renxian Wang , Changhao Li , Cairong Xiao , Fang Lu , Jinxia Zhai , Zhengnan Zhou , Yangfan Li , Lei Zhou , Zhiguo Song , Dafu Chen , Peng Yu , Chengyun Ning , Xieyuan Jiang ,

• 2106249
• Version of Record online: 12 September 2021

The 0D/1D heterojunction implant is constructed by growing discretely distributed bismuth oxide nanodots in situ upon titanium dioxide nanocones on a titanium implant surface. The 0D/1D heterojunction has the bone tissue mimetic nanotopology and the built-in electric field at the nanoscale interface, achieving electro-biomechanical coupling to regulate bone regeneration.

Wide Working Temperature Range Rechargeable Lithium–Sulfur Batteries: A Critical Review

• 2107136
• Version of Record online: 12 September 2021

Extending the workability of ambient lithium–sulfur batteries to both higher and lower temperatures is of paramount importance for future task-specific applications. The recent material advances, insurmountable challenges, and mechanistic understandings for rechargeable lithium–sulfur batteries working at a wide temperature window are presented. The detailed material design roles and several future research directions are also provided.

A Textile-Based Temperature-Tolerant Stretchable Supercapacitor for Wearable Electronics

• 2106491
• Version of Record online: 12 September 2021

Herein, a textile-based stretchable supercapacitor is reported, and it exhibits high electrochemical performance, mechanical stability, and temperature tolerance over a wide temperature range. This study proves that the fabricated supercapacitor can be used as a sturdy energy storage device to power various wearable electronics regardless of drastic changes in temperature, humidity, and mechanical deformation.

3D Wearable Fabric-Based Micro-Supercapacitors with Ultra-High Areal Capacitance

• 2107484
• Version of Record online: 12 September 2021

A 3D fabric structure is employed for the first time as the porous skeleton to construct a high-section micro-supercapacitor. This architecture can utilize more active sites of thick electrodes, and the device demonstrates an ultra-high areal capacitance of 135.4 mF cm⁻². Thoroughly different from the common strategies of using plane substrates, this unique design represents important progress for future wearable/portable electronics.

Structure–Property Relationships of Precisely Chlorinated Thiophene-Substituted Acceptors

• 2106524
• Version of Record online: 12 September 2021

Chlorination is an important strategy to explore the relationship of structure–property of nonfullerene acceptors. BTIC-4Cl-TCl-γ with chlorine at the γ-position of the conjugated thiophene shows a 3D network structure while BTIC-4Cl-TCl-β is found to be reformed to a quasi-3D network, which promotes a champion open-circuit voltage of 0.86 V and has the highest efficiency (15.65%).

Self-Assembled Perovskite Nanoislands on CH₃NH₃PbI₃ Cuboid Single Crystals by Energetic Surface Engineering

Yurou Zhang , Dohyung Kim , Jung-Ho Yun , Jongchul Lim , Min-Cherl Jung , Xiaoming Wen , Jan Seidel , Eunyoung Choi , Mu Xiao , Tengfei Qiu , Miaoqiang Lyu , EQ Han , Mehri Ghasemi , Sean Lim , Henry J. Snaith , Jae Sung Yun , Lianzhou Wang ,

• 2105542
• Version of Record online: 12 September 2021

To restructure nonuniform CH₃NH₃PbI₃ perovskite crystal surfaces, an effective surface engineering strategy is successfully demonstrated. By thermally evaporating energetic CsI on single-crystal surfaces, a unique nanoisland structure is formed through a cation interdiffusion process. This morphology induces a gradient band bending, which increases the charge carrier mobility from 56 to 93 cm² V⁻¹ s⁻¹.

Optical Microelectromechanical Systems Technologies for Spectrally Adaptive Sensing and Imaging

• 2103153
• Version of Record online: 12 September 2021

This review presents wavelength tunable microelectromechanical systems (MEMS) optical filter technologies for the important infrared and the emerging terahertz wavelength bands of the electromagnetic spectrum with the fabrication effort being enabled by the Western Australian Node of ANFF. A low size, weight and power (SWaP) solution is demonstrated, delivering mechanically robust spectrally selective sensing suitable for deployment on field-portable platforms being increasingly demanded for remote sensing and imaging.

Pro-Healing Zwitterionic Skin Sensor Enables Multi-Indicator Distinction and Continuous Real-Time Monitoring

Hongshuang Guo , Ming Bai , Yingnan Zhu , Xinmeng Liu , Shu Tian , You Long , Yiming Ma , Chiyu Wen , Qingsi Li , Jing Yang , Lei Zhang ,

• 2106406
• Version of Record online: 12 September 2021

This zwitterionic ionic skin-like sensor system is designed as a "sandwich" structure. Based on this system, a smart wound dressing is developed to monitor and distinguish three important indicators of diabetic wounds in vivo—including infection, swelling, and blood glucose, as well as pro-healing the wounds.

Multistage Responsive Materials for Real-time, Reversible, and Sustainable Light-Writing

• 2106673
• Version of Record online: 12 September 2021

A multistage responsive material for real-time, reversible light-writing based on organized stage-by-stage responsive behaviors and polarity-dependent physicochemical fluorescence response is reported. The resulted materials can be pollution-freely written by hand-controlled near-infrared laser within 5 s, spontaneously erased within 20 s, and exhibit excellent re-writing ability (more than 5000 times while the variance of chromaticity coordinates < 0.0008).

Plasmon–Exciton Interactions: Spontaneous Emission and Strong Coupling

• 2100889
• Version of Record online: 12 September 2021

This review summarizes the progress on both the weak and strong coupling between surface plasmons and excitons. Typical methods for assembling coupling systems of plasmonic nanostructures and quantum emitters are introduced. The major aspects of plasmon modified spontaneous emission and the developments of strong coupling between plasmonic structures and various quantum emitters are reviewed.

Manifestation of Strongly Correlated Electrons in a 2D Kagome Metal–Organic Framework

• 2106474
• Version of Record online: 12 September 2021

Materials with a 2D kagome crystal structure yield potential for a wide range of tunable topological and correlated electron phases. The emergence of local magnetic moments resulting from strong electron-electron Coulomb interactions in a 2D kagome metal–organic framework is demonstrated. These findings pave the way for tunable electron correlations—and hence controllable electronic and magnetic quantum phases—in 2D organic materials.

Noble-Metal-Assisted Fast Interfacial Oxygen Migration with Topotactic Phase Transition in Perovskite Oxides

• 2106765
• Version of Record online: 12 September 2021

Oxygen ion migration in perovskite oxides (ABO₃) is critical for numerous electronic and energy-conversion functionalities. Noble metal (Pt, Ag)/SrMO₃ (M = Co, Fe) interfaces are constructed to achieve fast O²⁻ migration and bias-free topotactic phase transition due to the decrease of migration barrier, paving a facile way to realize fast oxygen kinetics at relatively low temperature.

Immune Cycle-Based Strategies for Cancer Immunotherapy

• 2107540
• Version of Record online: 12 September 2021

Immunotherapy, which utilizes the body's own immune system to attack tumors, has transformed the fate of oncology therapy. Various immune cells and immune factors are involved in the cancer immune cycle for cancer immunotherapy. Here, intelligent strategies based on the cancer immune cycle are summarized and some research prospects are put forward to meet the demand of cancer immunotherapy in clinic.

CRISPR/Cas9-2D Silicene Gene-Editing Nanosystem for Remote NIR-II-Induced Tumor Microenvironment Reprogramming and Augmented Photonic Tumor Ablation

Haohao Yin , Bangguo Zhou , Caihong Dong , Yan Zhang , Jifeng Yu , Yinying Pu , Wei Feng , Liping Sun , Hui Hu , Yu Chen , Huixiong Xu ,

• 2107093
• Version of Record online: 12 September 2021

Herein, a second near-infrared biowindow (NIR-II) light-controlled CRISPR/Cas9 nanosystem, termed as silicene-Cas9, is constructed based on biosafe and biodegradable 2D silicene nanosheets. This work not only elucidates/addresses the underlying therapeutic efficacy challenge of photothermal tumor ablation, but also explores a gene-editing synergistic therapy modality based on a novel CRISPR/Cas9 gene delivery system, which also further broadens the biomedical application of 2D silicene nanosheets.

Lighting the Path: Light Delivery Strategies to Activate Photoresponsive Biomaterials In Vivo

• 2105989
• Version of Record online: 12 September 2021

The translation of photoresponsive biomaterials to clinical applications hinges on effective light delivery in the body. This review highlights the challenges of in vivo light delivery, and the materials-based light management technologies that can facilitate the photoactivation of biomaterials in the human body, particularly upconversion nanoparticles and optical waveguides.

Non-Classical Electrostriction in Hydrated Acceptor Doped BaZrO₃: Proton Trapping and Dopant Size Effect

• 2104188
• Version of Record online: 12 September 2021

The electrostrictive behavior of acceptor doped BaZrO₃ shows large non-classical values, relaxation, and saturation. Relaxation frequency, strain electrostriction coefficient, and saturation strain show a clear dependency on dopant/host size mismatch. This dependency emphasizes the importance of proton trapping in doped BaZrO₃ and links the non-classical electrostrictive behavior to lattice-distortion induced elastic dipoles that reorient under an electric field.

Chemical Design for Both Molecular and Morphology Optimization toward High-Performance Lithium-Ion Batteries Cathode Material Based on Covalent Organic Framework

Manman Wu , Yang Zhao , Ruiqi Zhao , Jie Zhu , Jie Liu , Yamin Zhang , Chenxi Li , Yanfeng Ma , Hongtao Zhang , Yongsheng Chen ,

• 2107703
• Version of Record online: 09 September 2021

By introducing a flexible building unit, a bipolar-type covalent organic framework (TP-TA COF) assembled using 2D hexagonal nanosheets is synthesized via a solvothermal method, achieving the simultaneous optimization of both molecular structure and morphology. When used as cathode material for lithium-ion batteries, the combination of the bipolar-type feature and favorable morphology of TP-TA COF renders excellent overall performance.

Charge-Transfer Effects of Organic Ligands on Energy Storage Performance of Oxide Nanoparticle-Based Electrodes

• 2106438
• Version of Record online: 09 September 2021

This work describes how the size, chemical functionality, and interfacial interaction of organic ligands affect the energy storage performance of oxide nanoparticle-based pseudocapacitor electrodes. The charge-transfer kinetics of pseudocapacitive and conductive oxide NP-based electrodes can be significantly enhanced by chemical reducing ligand-mediated layer-by-layer assembly, which leads to enhanced rate capability and capacity.

A Robust ROS Generation Strategy for Enhanced Chemodynamic/Photodynamic Therapy via H₂O₂/O₂ Self-Supply and Ca²⁺ Overloading

• 2106106
• Version of Record online: 09 September 2021

A smart pH-responsive degradable nanosystem CaO₂@ZIF-Fe/Ce6@PEG (CaZFCP) synthesized via a facile self-assembly method provides a robust reactive oxygen species generation strategy to simultaneously ease the restriction including insufficient H₂O₂ concentration and hypoxia in the tumor region, and further amplify intracellular oxidative stress by means of Ca²⁺ overloading, co-contributing to the efficacy of combined chemodynamic/photodynamic therapy.

Wearable Self-Powered Electrochemical Devices for Continuous Health Management

• 2107042
• Version of Record online: 09 September 2021

This review features the novel concept of wearable self-powered electrochemical devices (WeSPEDs). Importantly, key challenges in the development of WeSPEDs with emphasis in the energy generation and management modules are carefully addressed. Overall, the rise of WeSPEDs will lead to the next generation of wearable devices for sustainable and self-sufficient management of health and well-being.

Highly Transparent and Conductive Indium-Free Vanadates Crystallized at Reduced Temperature on Glass Using a 2D Transparent Nanosheet Seed Layer

Alexis Boileau , Simon Hurand , Florent Baudouin , Ulrike Lüders , Marie Dallocchio , Bruno Bérini , Aimane Cheikh , Adrian David , Fabien Paumier , Thierry Girardeau , Philippe Marie , Christophe Labbé , Julien Cardin , Damien Aureau , Mathieu Frégnaux , Maryline Guilloux-Viry , Wilfrid Prellier , Yves Dumont , Valérie Demange , Arnaud Fouchet ,

• 2108047
• Version of Record online: 09 September 2021

The integration of a new class of transparent conductor oxides (TCOs) based on a vanadate perovskite structure is achieved using a 2D transparent nanosheet template layer on glass at low temperature. This work provides a complete description of the heterostructure by morphological, structural, electrical, and optical analyses and opens new perspectives for the integration of complex indium-free TCOs onto non-adapted substrates.

Projected Mushroom Type Phase-Change Memory

Syed Ghazi Sarwat , Timothy M. Philip , Ching-Tzu Chen , Benedikt Kersting , Robert L. Bruce , Cheng-Wei Cheng , Ning Li , Nicole Saulnier , Matthew BrightSky , Abu Sebastian ,

• 2106547
• Version of Record online: 09 September 2021

Nonvolatile memory devices, which can both store and compute information are emerging building blocks for brain-inspired and in-memory computing. Here, the nuts and bolts of a "projected" mushroom type phase change computational device that can decouple the device's readout characteristics from the noisy properties of the phase change material are discussed.

Bioinspired Intrinsic Versatile Hydrogel Fabricated by Amyloidal Toxin Simulant-Based Nanofibrous Assemblies for Accelerated Diabetic Wound Healing

Qize Xuan , Feng Jiang , Hao Dong , Wenxue Zhang , Feiyang Zhang , Tonghao Ma , Jiafeng Zhuang , Jinlong Yu , Yibing Wang , Hao Shen , Chao Chen , Ping Wang ,

• 2106705
• Version of Record online: 09 September 2021

Inspired from smart defense tactics of S. aureus using switchable amyloidal toxin, a self-assembly strategy is developed to fabricate versatile supramolecular hydrogel using toxin simulant (FLN) as building blocks. This hydrogel retains bactericidal activity of amyloidal toxin, and the assembled nanofibrils mimicking extracellular matrix endow the hydrogel the activity of accelerating wound healing in diabetes, avoiding the cytotoxicity.

A New Strategy for Accelerating Dynamic Proton Transfer of Electrochemical CO₂ Reduction at High Current Densities

Xinyue Wang , Shaohua Feng , Weichao Lu , Yingjie Zhao , Sixing Zheng , Wanzhen Zheng , Xiahan Sang , Lirong Zheng , Yu Xie , Zhongjian Li , Bin Yang , Lecheng Lei , Shaobin Wang , Yang Hou ,

• 2104243
• Version of Record online: 09 September 2021

An atomically dispersed nickel site anchored on a nitrogen-doped porous carbon skeleton coupled with nanostructured zirconium oxide is developed for highly efficient CO₂ reduction to produce CO.

The AIE-Active Dual-Cationic Molecular Engineering: Synergistic Effect of Dark Toxicity and Phototoxicity for Anticancer Therapy

Yucheng Ma , Zeyan Zhuang , Longjiang Xing , Jianqing Li , Zhiwen Yang , Shaomin Ji , Rong Hu , Zujin Zhao , Yanping Huo , Ben Zhong Tang ,

• 2106988
• Version of Record online: 09 September 2021

A series of dual-cationic fluorophores with N⁺ and P⁺ group are prepared as organelle-targeting antitumor photosensitizers (PSs) with aggregation-induced emission activity. These PSs could selectively accumulate at the mitochondria or lysosomes with both dark- and photo-cytotoxicity, making them possess excellent killing effect on cancer cells and efficient inhibition of tumor growth in living mice.

Harvesting Multidirectional Breeze Energy and Self-Powered Intelligent Fire Detection Systems Based on Triboelectric Nanogenerator and Fluid-Dynamic Modeling

Xuemei Zhang , Jie Hu , Qianxi Yang , Hongmei Yang , Huake Yang , Qianying Li , Xiaochuan Li , Chenguo Hu , Yi Xi , Zhong Lin Wang ,

• 2106527
• Version of Record online: 09 September 2021

A super-durable triboelectric nanogenerator based on flow-induced vibration (F-TENG) is proposed. The wind-impact object model is constructed to study the fluid–solid interaction mechanism and calculate the structure-effect relationship. F-TENG efficiently converts multidirectional breeze energy into stable electric energy and acts as a wind sensing system. The collected environmental information can be used to construct a self-powered fire detection system.

Recent Progress on Synthesis, Characterization, and Applications of Metal Halide Perovskites@Metal Oxide

• 2104634
• Version of Record online: 09 September 2021

This review summarizes the latest research related to the strategies to fabricate the metal halide perovskites@metal oxide (MHPs@MO _x ) composites, techniques to systematically evaluate the performances, and structures of the composites. And recent achievements in various applications are also presented based on different MO _x . Finally, conclusions and future research prospects are also outlined to ensure a bright future of MHPs@MO _x .

3D/2D Perovskite Single Crystals Heterojunction for Suppressed Ions Migration in Hard X-Ray Detection

• 2104880
• Version of Record online: 08 September 2021

The 2D epitaxial layer of the 3D/2D perovskite single crystals heterojunction can passivate the surface defects and suppress ion migration or short formamidine FA⁺ ion volatilization, which boost its optoelectric properties. The 3D/2D heterojunction X-ray detector exhibits stable response to 120 kV_p hard X-rays with the lowest detectable dose rate of 55 nGy_airs⁻¹.

A Puncture-Resistant and Self-Healing Conductive Gel for Multifunctional Electronic Skin

• 2107006
• Version of Record online: 08 September 2021

A new solvent-free polymer conductive gel is obtained by combining flexible sulfonate-containing poly(thioctic acid) polymer chains and rigid conductive polyaniline rods. The conductive gel shows good flexibility, puncture-resistance, notch-insensitivity, and fast self-healing ability. Moreover, this conductive gel can convert changes in temperature and strain into electrical signal changes, and thus can be used for multifunctional electronic skin.

Enzyme Mimics for Engineered Biomimetic Cascade Nanoreactors: Mechanism, Applications, and Prospects

• 2106139
• Version of Record online: 08 September 2021

The latest research advances in the construction and cascade catalytic mechanism of enzyme mimics for engineered biomimetic cascade catalytic nanoreactors and their progressive applications in the field of biosensing and for biomedical applications are comprehensively summarized. In addition, the most important challenges and opportunities remaining in this exciting area of research are highlighted.

Emission Wavelength Tuning via Competing Lattice Expansion and Octahedral Tilting for Efficient Red Perovskite Light-Emitting Diodes

Guanwei Sun , Xinyan Liu , Zhe Liu , Denghui Liu , Fanyuan Meng , Zhenchao Li , Linghao Chu , Weidong Qiu , Xiaomei Peng , Wentao Xie , Chenyang Shen , Jiting Chen , Hin-Lap Yip , Shi-Jian Su ,

• 2106691
• Version of Record online: 08 September 2021

A unique phenomenon that lattice expansion competes with octahedral tilt is demonstrated by incorporating large organic cations into the A-site of perovskites, leading to a competitive spectral redshift and blueshift, respectively. An external quantum efficiency of 17.5% is realized for deep-red perovskite light-emitting diodes owing to the synergistic passivation of 1-naphthylmethylammonium iodide and excess cations.

Triboelectric Polymer with High Thermal Charge Stability for Harvesting Energy from 200 °C Flowing Air

• 2106082
• Version of Record online: 07 September 2021

The BaTiO₃-doped fluorinated polyimide film with a big band gap and interfacial deep traps can provide a tribocharge density of 200 µC m⁻². A flutter-driven triboelectric nanogenerator is designed based on this material, which can maintain 32% of its output performance at 200 °C in comparison with room temperature, which is the highest thermal charge stability reported for triboelectric polymers.

Poly(5-nitroindole) Thin Film as Conductive and Adhesive Interfacial Layer for Robust Neural Interface

Ming Yang , Taotao Yang , Hanjie Deng , Jingjing Wang , Shan Ning , Xing Li , Xiaoning Ren , Yuming Su , Jianfeng Zang , Xiaojian Li , Zhiqiang Luo ,

• 2105857
• Version of Record online: 07 September 2021

A novel combination method of electropolymerization and electrografting is explored to create poly(5-nitroindole) (PIN-5NO₂) as a conductive and adhesive interfacial layer for robust poly(3,4-ethylenedioxythiophene) (PEDOT) neural interface. The Au/PIN-5NO₂/PEDOT electrodes show strong adhesion, superior electrochemical properties, mechanical and electrochemical stability, and biocompatibility. The microelectrocorticographic devices with Au/PIN-5NO₂/PEDOT microelectrodes can capture neural dynamics of the brain, especially the high gamma band.

Highly Efficient Nonvolatile Magnetization Switching and Multi-Level States by Current in Single Van der Waals Topological Ferromagnet Fe₃GeTe₂

Kaixuan Zhang , Youjin Lee , Matthew J. Coak , Junghyun Kim , Suhan Son , Inho Hwang , Dong-Su Ko , Youngtek Oh , Insu Jeon , Dohun Kim , Changgan Zeng , Hyun-Woo Lee , Je-Geun Park ,

• 2105992
• Version of Record online: 07 September 2021

The highly energy-efficient nonvolatile magnetization switching and multi-level states by current are achieved in single van-der-Waals (vdW) topological ferromagnet Fe₃GeTe₂. The switching current density and power dissipation are about 400 and 4000 times smaller than conventional magnet/heavy-metal-based spin orbit torque magnetic random access memory. The observations combine high energy-efficiency and large information-capacity-density in one device, bringing the nascent vdW magnets toward spin memory and spintronics.

Shedding Light on Functional Hybrid Nanocomposites 19th Century Paint Medium

Hélène Pasco , Laurence de Viguerie , Marco Faustini , Cristina Coelho-Diogo , Ovidiu Ersen , Christel Gervais , Frédéric Gobeaux , Dris Ihiawakrim , Maguy Jaber , Philippe Walter , Clément Sanchez ,

• 2106346
• Version of Record online: 07 September 2021

The in-depth analytical study of a famous recipe of gel paint media used by 19th century painters reveals: (1) their complex driving gelation mechanism by the supramolecular self-assembly of metallogels based on the formation of lead-resin "soaps"; (2) their nanocomposite nature with the unexpected presence of semi-conductor lead oxide nanoparticles, co-existing with lamellar metallogels and partially polymerized gel.

Identifying Migration Channels and Bottlenecks in Monoclinic NASICON-Type Solid Electrolytes with Hierarchical Ion-Transport Algorithms

Zheyi Zou , Nan Ma , Aiping Wang , Yunbing Ran , Tao Song , Bing He , Anjiang Ye , Penghui Mi , Liwen Zhang , Hang Zhou , Yao Jiao , Jinping Liu , Da Wang , Yajie Li , Maxim Avdeev , Siqi Shi ,

• 2107747
• Version of Record online: 07 September 2021

Na⁺ diffusion pathways in monoclinic natrium superionic conductors (NASICON) are identified by integrating geometric analysis, bond-valence energy landscapes analysis, and ab initio molecular dynamics simulations. This set of hierarchical algorithms not only shows efficiency and practicality in revealing the ion transport in monoclinic NASICON, but also provides guidelines for optimizing their conductive properties that can be extended to other fast ion conductors.

Charge-Guided Micro/Nano-Hydrogel Microsphere for Penetrating Cartilage Matrix

• 2107678
• Version of Record online: 07 September 2021

The charge-guided micro/nano-hydrogel microsphere capable of cartilage matrix penetration is constructed via building the positively charged nanosized secondary structure that allows it to penetrate deep into the cartilage through the electrostatic adsorption effect produced by the interaction with the negative charge of the cartilage matrix and provides efficient delivery of cartilage drugs.

Photo-Polymerization Induced Hierarchical Pattern via Self-Wrinkling

• 2106754
• Version of Record online: 06 September 2021

A facile and robust strategy for fabricating the hierarchical pattern of self-wrinkling is developed by combining the self-assemble of fluorinated additive, photodimerization of anthracene, and one-step polymerization. This technique, integrating the advantages of top-down and bottom-up methods, providing the brand-new choice for on-demand surface-patterning, has great potential in the application of anti-counterfeiting, 3D printing, and electronic device.

Donor–Acceptor-Type Organic-Small-Molecule-Based Solar-Energy-Absorbing Material for Highly Efficient Water Evaporation and Thermoelectric Power Generation

Yuanyuan Cui , Jing Liu , Zhiqiang Li , Mingyang Ji , Meng Zhao , Meihua Shen , Xue Han , Tao Jia , Chenglong Li , Yue Wang ,

• 2106247
• Version of Record online: 06 September 2021

An organic-small-molecule solar-energy-absorbing material with a strong intramolecular charge transfer character and a conjugate rigid plane skeleton is developed, which exhibits a wide absorption spectrum of 300–850 nm for efficient solar energy harvesting and highly efficient water evaporation and thermoelectricity power generation.

Integrated Quasi-2D Perovskite/Organic Solar Cells with Efficiency over 19% Promoted by Interface Passivation

• 2107129
• Version of Record online: 05 September 2021

An efficient interface passivation strategy for integrated perovskite/organic solar cells (IPOSCs) based on layered RP perovskite is demonstrated. The polymer PM6 is developed as the passivation layer to reduce the interface defects and suppress the nonradiation recombination in IPOSCs, leading to an improved V _OC from 1.06 to 1.12 V. The optimized IPOSC exhibits a champion efficiency of 19.15%, much higher than the control device (PCE = 16.33%).

3D Interconnected Conductive Graphite Nanoplatelet Welded Carbon Nanotube Networks for Stretchable Conductors

• 2107082
• Version of Record online: 05 September 2021

A stretchable, flexible, durable composite with a robust conductive structure is achieved by the graphitic welding of a carbon nanotube sponge into an interconnected 3D network. The connectivity provided by graphite welding ensures facile interfacial transfer of mechanical stress and electron within the graphite nanoplatelet welded carbon nanotube (GNP-w-CNT/PDMS) conductive composite.

Inherently UV Photodegradable Poly(methacrylate) Gels

• 2105681
• Version of Record online: 05 September 2021

Poly(methacrylate) gels infused with 1-nonanol or 1-butanol undergo fast photodegradation upon UV light irradiation. No additional photosensitizers or photolabile moieties are required to create organogel particles, arrays, and patterned organogel surfaces via UV degradation. Slippery organogel channels extracting a dye from water are created, and degradable organogels films on copper serve as the first-ever gel-based positive photoresist.

The Trapped Charges at Grain Boundaries in Perovskite Solar Cells

Pengcheng Jia , Liang Qin , Di Zhao , Yang Tang , Bo Song , Junhan Guo , Xiaomeng Li , Ling Li , Qiuhong Cui , Yufeng Hu , Zhidong Lou , Feng Teng , Yanbing Hou ,

• 2107125
• Version of Record online: 05 September 2021

A residual charge testing approach is used to investigate the trapping and detrapping process in the perovskite solar cells based on the active layers with different crystallization and the morphology. The results reveal that the residual charge exists widely at the grain boundary, and the residual charge is related to the performance of the perovskite solar cells.

Engineering Polymer Glue towards 90% Zinc Utilization for 1000 Hours to Make High-Performance Zn-Ion Batteries

Yiding Jiao , Fangyan Li , Xin Jin , Qingsong Lei , Luhe Li , Lie Wang , Tingting Ye , Er He , Jiacheng Wang , Hao Chen , Jiang Lu , Rui Gao , Qianming Li , Chang Jiang , Jianwei Li , Guanjie He , Meng Liao , Huigang Zhang , Ivan P. Parkin , Huisheng Peng , Ye Zhang ,

• 2107652
• Version of Record online: 05 September 2021

Polymer glue is designed to simultaneously solve corrosion, passivation, and dendrite growth for zinc anode. The modified zinc anode demonstrates 90% zinc utilization at 5 mA cm⁻² for 1000 h. Full zinc-ion batteries are made to show an ultrahigh energy density of 228 Wh kg⁻¹ based on the total mass of electrodes, superior rate performance, and long lifespan.

A Solvent Regulated Hydrogen Bond Crosslinking Strategy to Prepare Robust Hydrogel Paint for Oil/Water Separation

• 2104701
• Version of Record online: 05 September 2021

A strategy of using ethanol to dynamically regulate the hydrogen bond crosslinking between polyvinyl alcohol and tannic acid is proposed to prepare a "hydrogel paint", which can be applied on the porous substrate surface by different one-step operations (dip, brush, spray, etc.). The super-hydrophilicity, underwater super-oleophobicity of hydrogel renders resultant composites with high performance in oil-water separation.

Lead-Free Double Perovskite Cs₂AgBiBr₆: Fundamentals, Applications, and Perspectives

• 2105898
• Version of Record online: 05 September 2021

The recent progress in lead-free double perovskite Cs₂AgBiBr₆ is comprehensively reviewed. The fundamental properties are systematically discussed and the achievements in Cs₂AgBiBr₆ related applications are highlighted. Moreover, the challenges in Cs₂AgBiBr₆ materials and applications are emphasized, and perspectives for future research in this field are provided.

Biomimetic 4D-Printed Breathing Hydrogel Actuators by Nanothylakoid and Thermoresponsive Polymer Networks

• 2105544
• Version of Record online: 04 September 2021

Biomimetic 4D-printed breathing hydrogel actuators composed of nanothylakoids and thermoresponsive polymer networks are reported. Upon thermal stimulation/laser irradiation, the actuators can reversibly bend/unbend due to the photothermal conversion of nanothylakoids and the printed-thermoresponsive asymmetric bilayer structure. Moreover, the catalase-like property of nanothylakoids imparts the actuators with O₂ evolution capability to breathe for mimicking botanical systems.

Giant Nonlinear Optical Absorption of Ion-Intercalated Tin Disulfide Associated with Abundant In-Gap Defects

• 2106930
• Version of Record online: 04 September 2021

Defect introduction serves as an effective approach to promoting the nonlinear optical absorption properties of materials and is conveniently implemented via electrochemical ion intercalation. Li_0.952Sn^II _0.398Sn^IV _0.563S₂ resulting from the Li⁺ ion intercalation of SnS₂ nanosheets possesses strong saturable absorption under laser excitation at 515 nm and reverse saturable absorption under laser excitation at 800 and 1030 nm.

Understanding the Role of Grain Boundaries on Charge-Carrier and Ion Transport in Cs₂AgBiBr₆ Thin Films

Zewei Li , Satyaprasad P. Senanayak , Linjie Dai , Gunnar Kusch , Ravichandran Shivanna , Youcheng Zhang , Dipika Pradhan , Junzhi Ye , Yi-Teng Huang , Henning Sirringhaus , Rachel A. Oliver , Neil C. Greenham , Richard H. Friend , Robert L. Z. Hoye ,

• 2104981
• Version of Record online: 04 September 2021

Cs₂AgBiBr₆ has gained attention as a lead-free, stable perovskite. However, the transport properties in thin films have significantly fallen short of their single crystal counterparts. Herein, through cathodoluminescence mapping measurements and by developing the first double perovskite field-effect transistors, grain boundaries are identified to be a key limiting factor, acting as the dominant sites for nonradiative recombination and ion migration.

Balancing Intermolecular Interactions between Acceptors and Donor/Acceptor for Efficient Organic Photovoltaics

Chenyu Han , Jianxiao Wang , Liangliang Chen , Jingfei Chen , Long Zhou , Pengchao Wang , Wenfei Shen , Nan Zheng , Shuguang Wen , Yonghai Li , Xichang Bao ,

• 2107026
• Version of Record online: 04 September 2021

The complicated intermolecular interactions in bulk-heterojunction (BHJ) play a fundamental role in organic photovoltaics. This study implies that the interactions between acceptors (A/A) and donor/acceptor (D/A) interactions synergistically control the nanoscale networks of BHJ and exciton/charge behaviors. Therefore, balancing these two kinds of intermolecular interactions should be well considered for constructing high performance organic photovoltaics.

Shape-Engineerable Silk Fibroin Papers for Ideal Substrate Alternatives of Plastic Electronics

Haitao Liu , Wei Wei , Lei Zhang , Jianliang Xiao , Jing Pan , Qin Wu , Shuqi Ma , Hao Dong , Longteng Yu , Wenzhen Yang , Dacheng Wei , Hongwei Ouyang , Yunqi Liu ,

• 2104088
• Version of Record online: 03 September 2021

A "green" candidate as an alternative for the substrate of unconventional plastic electronics is developed. The excellent comprehensive performance, including mechanical robustness, shape-engineerability, printability, high transparency, skin-like properties, and high breathability, provides a unique material choice, especially for epidermal applications. Prototypes such as biomeshes, electronics, and kirigami based devices are demonstrated.

Computational Studies on Carbon Dots Electrocatalysis: A Review

• 2107196
• Version of Record online: 03 September 2021

Facing the growing energy crisis, electrocatalytic reactions have made prominent contributions. The emerging carbon dots (CDs) become attractive electrocatalyst candidates, owing to their high conductivity, easy modification, abundant active sites, and so forth. However, the complex structure renders high performance CDs debatable. It thus seems important to understand the specific property and mechanism from a theoretical view.

The Role of Electronic Junctions in Artificial Interface Engineering: The Case for Indium Tin Oxide on LiMn₂O₄ Electrodes

• 2105180
• Version of Record online: 03 September 2021

The addition of thin indium tin oxide coatings on LiMn₂O₄ unexpectedly leads to inhibition of the electrolyte oxidation rate. The effect is explained by analyzing the electronic band structure and subsequently predicting the effect of electronically conductive oxide coatings on the electrochemical stability of the system. Furthermore, the benefit of electronically conductive coatings through the enhanced local electronic conductance is demonstrated.

Efficiency Breakthrough of Fluorescence OLEDs by the Strategic Management of "Hot Excitons" at Highly Lying Excitation Triplet Energy Levels

Chengwei Lin , Pengbo Han , Shu Xiao , Fenlan Qu , Jingwen Yao , Xianfeng Qiao , Dezhi Yang , Yanfeng Dai , Qian Sun , Dehua Hu , Anjun Qin , Yuguang Ma , Ben Zhong Tang , Dongge Ma ,

• 2106912
• Version of Record online: 02 September 2021

The Förster resonance energy transfer between two molecules can facilitate the high-lying reverse intersystem crossing process in aggregation-induced emission and hybridized local and charge-transfer hosts, thereby reducing the loss from T _n to T _{n −1} state and improving exciton utilization, and finally realizing the efficiency breakthrough of blue fluorescence organic light-emitting diodes.

HfO₂-Based Memristor as an Artificial Synapse for Neuromorphic Computing with Tri-Layer HfO₂/BiFeO₃/HfO₂ Design

Zehui Peng , Facai Wu , Li Jiang , Guangsen Cao , Bei Jiang , Gong Cheng , Shanwu Ke , Kuan-Chang Chang , Lei Li , Cong Ye ,

• 2107131
• Version of Record online: 02 September 2021

The novel designed tri-layer HfO₂/BiFeO₃(BFO)/HfO₂ memristor shows excellent resistive switching performance. Essential synaptic functions can be successfully realized. The pattern recognition accuracy is more than 91.2%. The sufficient oxygen vacancies in the inserting BFO thin film play a crucial role in adjusting the growth of Hf CFs, which lead to the promising synaptic and enhanced RS behavior for neuromorphic computing.

Neuro-Receptor Mediated Synapse Device Based on the Crumpled MXene Ti₃C₂T _x Nanosheets

• 2104304
• Version of Record online: 02 September 2021

A biomimetic neuro-receptor-mediated synapse device is developed by using the crumpled MXene nanosheets. The biochemical reactions between acetylcholine receptor and acetylcholine triggered neuro-response, and the pathogenic autoantibody injured ones are both realized. The emulated neuro-responding is consistent with the disease of myasthenia gravis. The working mechanisms are expounded by the reversible valence changing theory of Ti in MXene.

Finite-Temperature Dynamics in Cesium Lead Iodide Halide Perovskite

• 2106264
• Version of Record online: 02 September 2021

The dynamical behaviors of CsPbI₃ perovskite across temperature and structural phase transitions are investigated theoretically. Two iodine-octahedral-tilt modes soften in the Pm $\overline{3}$ m phase; one sub-THz mode maintains very low frequency in the P4/mbm phase arising from the temporal exploration of various structural states, and it has mixed fluctuations of antiphase iodine tiltings and Cs antipolar motions.

Novel Polymorph of GaSe

• 2104965
• Version of Record online: 02 September 2021

The observation of a new GaSe polymorph is reported, obtained by molecular beam epitaxy growth, with a cs-TL (D_3d). In particular, they show a comprehensive characterization of the atomic structure of this GaSe polymorph by aberration corrected scanning transmission electron microscopy. Moreover, the stability of this polymorph is verified by density functional theory calculations, from which the band structure and Raman intensities are predicted.

Robust Single Molecule Magnet Monolayers on Graphene and Graphite with Magnetic Hysteresis up to 28 K

Lukas Spree , Fupin Liu , Volker Neu , Marco Rosenkranz , Georgios Velkos , Yaofeng Wang , Sandra Schiemenz , Jan Dreiser , Pierluigi Gargiani , Manuel Valvidares , Chia-Hsiang Chen , Bernd Büchner , Stanislav M. Avdoshenko , Alexey A. Popov ,

• 2105516
• Version of Record online: 01 September 2021

Air-stable fullerene-based single-molecule magnet Tb₂@C₈₀(CH₂Ph) is functionalized with pyrene groups. Self-assembled monolayers of the derivative on graphite and graphene demonstrate magnetic hysteresis up to 28 K.

Polymer Pressure-Sensitive Adhesive with A Temperature-Insensitive Loss Factor Operating Under Water and Oil

• 2104296
• Version of Record online: 01 September 2021

Adhesion operation under-water/oil over a wide temperature range is achieved by hydrophobic oil-draining structure and temperature-insensitive loss factor. A key point is to use methoxyethyl and thiourea groups that form hydrophobic and weak hydrogen-bonding interactions, bringing tan δ close to 1. The other key point is to incorporate the Teflon micron particles to form an oil-draining structure on adhesive surfaces.

Anodic Transformation of a Core-Shell Prussian Blue Analogue to a Bifunctional Electrocatalyst for Water Splitting

• 2106835
• Version of Record online: 01 September 2021

The transformation of a Prussian blue analogue (NiCo-PBA) to a layered metal hydroxide by anodization is investigated. Two PBAs are considered, a simple crystalline NiCo-PBA and a crystalline NiCo-PBA with an amorphous shell designed to prevent the disintegration of the material upon transformation. The as-formed materials are characterized and the electrocatalytic performance and underlying mechanism are analyzed in detail.

Engineering Bacteria-Activated Multifunctionalized Hydrogel for Promoting Diabetic Wound Healing

• 2105749
• Version of Record online: 01 September 2021

Engineering a bacteria-activated multifunctionalized hydrogel for accelerated angiogenesis and rapid healing of diabetic wounds is reported in this work. Topical wound treatment with this living bacteria hydrogel alters the wound microenvironment through on-site growth factors and macrophage polarization regulator co-delivery, resulting in the reinforcement of tissue regeneration that drives the healing process.

Multifunctional DNA Hydrogels with Hydrocolloid-Cotton Structure for Regeneration of Diabetic Infectious Wounds

Liping Zhou , Wei Pi , Siyang Cheng , Zhen Gu , Kexin Zhang , Tiantian Min , Wenmin Zhang , Hongwu Du , Peixun Zhang , Yongqiang Wen ,

• 2106167
• Version of Record online: 01 September 2021

The multi-functional DNA hydrogel features excellent exudate absorption performance, adjustable heating ability, mechanical behavior, self-healing ability, writability, tissue adhesion, and antibacterial properties. In addition, the DNA dressing promotes the transformation of macrophages from pro-inflammatory M1 into repairing M2 phenotype and recruits myeloid cells to activate adaptive immunity by cascade management to promote tissue regeneration.

Polymeric Nanoneedle Arrays Mediate Stiffness-Independent Intracellular Delivery

Hao Zhe Yoh , Yaping Chen , Stella Aslanoglou , Sherman Wong , Zlatan Trifunovic , Simon Crawford , Esther Lestrell , Craig Priest , Maria Alba , Helmut Thissen , Nicolas H. Voelcker , Roey Elnathan ,

• 2104828
• Version of Record online: 01 September 2021

Polymeric nanoneedle arrays of precise geometry are fabricated using commercially available polymers—polystyrene, SU8, and polydimethylsiloxane—to facilitate mRNA delivery into both adherent and suspension mammalian cells. By comparing nanoneedle substrates of identical topography but varying stiffness, this study decouples the effects on cell behavior of substrate stiffness and topography.

Electronic Structure Modulation of Nanoporous Cobalt Phosphide by Carbon Doping for Alkaline Hydrogen Evolution Reaction

• 2107333
• Version of Record online: 01 September 2021

Seawater electrolysis under alkaline conditions presents an attractive alternative to traditional freshwater electrolysis for mass sustainable high-purity hydrogen production. Nanoporous carbon-doped cobalt phosphide provides a hydrogen delivery pathway for water dissociation and optimizes desorption of hydrogen due to the electrons modulation by carbon doping, resulting in efficient catalytic activity and durability toward the alkaline hydrogen evolution.

Enhanced Thermal Transport across Self-Interfacing van der Waals Contacts in Flexible Thermal Devices

Minho Seong , Insol Hwang , Seongjin Park , Hyejin Jang , Geonjun Choi , Jaeil Kim , Shin-Kwan Kim , Gun-Ho Kim , Junyeob Yeo , Hoon Eui Jeong ,

• 2107023
• Version of Record online: 01 September 2021

A self-interfacing flexible thermal device that can form robust mechanical and low-resistant thermal contact with planar and non-planar substrates without the need for external pressure or surface modification is presented. Based on a distinctive integration of a bioinspired adhesive architecture and percolating silver nanowire networks, the proposed device exhibits a strong attachment to target substrates while facilitating efficient thermal transport.

Defects in Hybrid Perovskites: The Secret of Efficient Charge Transport

• 2104467
• Version of Record online: 01 September 2021

Time of flight currents shed light on the interaction of free electrons and holes with defects in MAPbI₃ perovskite. Reconstruction of carrier transport dynamics reveals the effect of defects on diffusion length, lifetime, and mobility. Photo-Hall and thermoelectric spectroscopies assess parameters of defects. Advanced characterization of charge transport and defects can stimulate new device architectures and material modification pathways.

Ultrathin and Ultralight Zn Micromesh-Induced Spatial-Selection Deposition for Flexible High-Specific-Energy Zn-Ion Batteries

• 2106550
• Version of Record online: 31 August 2021

A flexible ultrathin and ultralight Zn micromesh with regularly aligned microholes is fabricated through highly mature and scalable techniques. The unique microholes-engineered Zn micromesh presents excellent mechanical and electrical properties. Numerical simulations and in situ microscopic observation system certify the induced spatial-selection deposition into inner walls of microholes. Furthermore, the assembled pouch cell demonstrates superb flexibility and long-lasting stability.

Robust Metallic Actuators Based on Nanoporous Gold Rapidly Dealloyed from Gold–Nickel Precursors

• 2107241
• Version of Record online: 31 August 2021

Stable, durable, and reversible electrochemical actuation of bulk nanoporous gold takes place under cyclic potential triggering at various scan rates for 13 h with negligible coarsening-induced strain-shift. It is rapidly dealloyed from single-phase Au₂₅Ni₇₅ solid-solution for only 1.6 h, with ultra-low residual Ni content <1 at% and high relative density ≈36% for sufficient network connectivity and mechanical robustness for actuators.

Ultrafast Electrochemical Growth of Lithiophilic Nano-Flake Arrays for Stable Lithium Metal Anode

Haorui Shen , Fulai Qi , Hucheng Li , Pei Tang , Xuning Gao , Shan Yang , Zichen Hu , Zhuangnan Li , Jun Tan , Shuo Bai , Feng Li ,

• 2103309
• Version of Record online: 31 August 2021

To generate a high-quality in situ solid electrolyte interface (SEI), Cu₇S₄ nano-flake arrays are ultrafast grown on Cu in 5 s by electrochemical method. This SEI effectively prevents the spherical lithium nuclei from growing into lithium dendrites and thus leads to less dead lithium. The critical role of high Li₂S content in SEI for uniform Li⁺ flux is emphasized.

Copper(I) Complex as Sensitizer Enables High-Performance Organic Light-Emitting Diodes with Very Low Efficiency Roll-Off

Lisi Zhan , Ao Ying , Yanyu Qi , Kailong Wu , Yang Tang , Yao Tan , Yang Zou , Guohua Xie , Shaolong Gong , Chuluo Yang ,

• 2106345
• Version of Record online: 31 August 2021

A Cu(I) complex with an extremely fast reverse intersystem crossing rate is demonstrated as a thermally activated delayed fluorescence sensitizer for a both conventional fluorescent and multi-resonance thermally activated delayed fluorescence (MR-TADF) emitter. The resulting fluorescent guest-based device shows very low efficiency roll-off at high luminance, while the MR-TADF OLED realizes a record-high EQE of 26.5% with a narrowband emission peaking at 566 nm and a full-width at half maximum of 46 nm.

Evolvable Skin Electronics by In Situ and In Operando Adaptation

• 2106329
• Version of Record online: 31 August 2021

In situ and in operando adaptation (SOA), a customizable electronic fabrication platform, is developed which allows for evolvable functions of skin electronics. SOA renders an immediate response to various user specifications possible, offering concurrent customization for various applications including human physiology/motion sensors. Also, simultaneous impedance optimization of devices on different body parts and users enables on-skin wireless power supply.

Solution-Synthesized Multifunctional Janus Nanotree Microswimmer

Jia Dai , Xiang Cheng , Xiaofeng Li , Zhisheng Wang , Yufeng Wang , Jing Zheng , Jun Liu , Jiawei Chen , Changjin Wu , Jinyao Tang ,

• 2106204
• Version of Record online: 31 August 2021

Colloid synthesis can be adopted to synthesize the multicomposition gold-loaded titania-silica nanotree with a high yield. Demonstration of the nanotree multifunctionality under photoelectrophoresis by UV and visible light radiation, thermophoresis by near-infrared radiation, and AC electric field with induced-charge electrophoresis is achieved. The nanotree could be applied as a regenerable decontamination vehicle to effectively remove and reclaim mercury ions for water treatment.

Layered Metal-Halide Perovskite Single-Crystalline Microwire Arrays for Anisotropic Nonlinear Optics

Jinjin Zhao , Yingjie Zhao , Yangwu Guo , Xiuqin Zhan , Jiangang Feng , Yue Geng , Meng Yuan , Xin Fan , Hanfei Gao , Lei Jiang , Yongli Yan , Yuchen Wu ,

• 2105855
• Version of Record online: 28 August 2021

Layered chiral perovskite single-crystalline microwire arrays with pure crystallographic orientation and homogeneous size are fabricated by a capillary-bridge-manipulated strategy through controllable fluid dynamics and crystallization. These microwire arrays exhibit excellent nonlinear-optical properties: strong anisotropy in second harmonic generation (SHG) and two-photon fluorescence signals; and higher SHG conversion efficiency compared with their polycrystalline thin-film counterparts.

Quantification of Temperature-Dependent Charge Separation and Recombination Dynamics in Non-Fullerene Organic Photovoltaics

Christopher C. S. Chan , Chao Ma , Xinhui Zou , Zengshan Xing , Guichuan Zhang , Hin-Lap Yip , Robert A. Taylor , Yan He , Kam Sing Wong , Philip C. Y. Chow ,

• 2107157
• Version of Record online: 28 August 2021

In this study, transient optical spectroscopy methods are used to quantify the temperature-dependence of charge generation dynamics in efficient non-fullerene organic photovoltaic blends with a negligible driving force. The results show that the photogenerated electron–hole pairs can thermally separate at the D/A interface, given that they are sufficiently long-lived (even at a reduced temperature for state-of-the-art materials).

Synthesis and Modification of Boron Nitride Nanomaterials for Electrochemical Energy Storage: From Theory to Application

• 2106315
• Version of Record online: 28 August 2021

Because of its chemical stability, thermal stability, and strong mechanical strength, boron nitride (BN) has been widely studied. In recent years, with the modification and functionalization of BN, great breakthroughs have been made in electrochemistry. Here, the development of BN-based materials in different electrochemical energy storage fields is summarized and prospected in detail including the theoretical and experimental parts.

In Situ Monitoring of Polaron Localization and Cell Activity with Charge Accumulation Spectroscopy

• 2105799
• Version of Record online: 28 August 2021

The charge-induced absorption cross-section σ_p is demonstrated as an indicator for the microscopic molecular ordering of organic materials under electrolytes. Therefore the polaronic absorption feature is a safe and sensitive probe to detect in situ the morphology variations of poly[2,5-bis(3-dodecylthiophen-2-yl)thieno[3,2-b]thiophene] film working in the aqueous environment and monitor noninvasively the entire detaching process of human mesenchymal stem cells.

Out-of-Plane Resistance Switching of 2D Bi₂O₂Se at the Nanoscale

• 2105795
• Version of Record online: 28 August 2021

The out-of-plane electrical properties of two-dimensional (2D) Bi₂O₂Se at the nanoscale is revealed via conductive atomic force microscopy. Nanoscale hillocks form on 2D Bi₂O₂Se under the vertical electric field to serve as conductive pathways, by which 2D Bi₂O₂Se exhibits bipolar conduction window at the beginning of the forming process, and later transforms to stable unipolar resistance switching behavior.

Selectively Fluorinated Furan-Phenylene Co-Oligomers Pave the Way to Bright Ambipolar Light-Emitting Electronic Devices

Igor P. Koskin , Christina S. Becker , Alina A. Sonina , Vasiliy A. Trukhanov , Nikita A. Shumilov , Anatoly D. Kuimov , Yuliya S. Zhuravleva , Yuliya O. Kiseleva , Inna K. Shundrina , Peter S. Sherin , Dmitry Yu. Paraschuk , Maxim S. Kazantsev ,

• 2104638
• Version of Record online: 27 August 2021

Furan-phenylene co-oligomers commonly show inherent bright luminescence, enhanced molecular rigidity, but only p-type charge transport. Their selective fluorination improves the crystal packing, dramatically enhances the photostability and provides well-balanced ambipolar charge transport. As a result, the optimally fluorinated oligomer demonstrates efficient electroluminescence in ambipolar single-layer organic light-emitting transistors.

Nanomechanical Dissipation and Strain Engineering

• 2105247
• Version of Record online: 27 August 2021

Low dissipation nanomechanical resonators have applications ranging from biochemical sensing to mobile communications, single atom detection, and quantum technologies. This review pedagogically introduces new nanoengineering methods that achieve ultra-low dissipation, allowing mechanical quality factors up to a billion. Targeted to new entrants to the field, the review concludes by exploring the future performance and uses of these extreme-high quality resonators.

Reusable Polyacrylonitrile-Sulfur Extractor of Heavy Metal Ions from Wastewater

Peng Li , Haibin Jiang , Ariel Barr , Zhichu Ren , Rui Gao , Hua Wang , Weiwei Fan , Meifang Zhu , Guiyin Xu , Ju Li ,

• 2105845
• Version of Record online: 27 August 2021

A porous filter prepared from electronic conductivity polyacrylonitrile-sulfur grafted on industrially produced melamine foam, selective affinity for Hg²⁺, Pb²⁺, Cu²⁺, and Cd²⁺ is achieved. Chemically adsorbed ions can be electrochemically desorbed and reduced, which achieves the highest possible waste concentration. Both adsorption and desorption are exceptionally robust. This paradigm offers a sustainable and affordable approach for wastewater heavy metal ions recovery.

Compact Quantum-Dot Microbeads with Sub-Nanometer Emission Linewidth

• 2103413
• Version of Record online: 27 August 2021

A single mode compact quantum-dot micro bead laser is demonstrated. This quantum dot (QD) microbead shows sub-nanometer linewidth and excellent material stability. Ligand exchange with short bidentate ligands improves optical gain and refractive index, which as a result miniaturizes the size of laser down to 1.5 µm. Intracelluar tagging and multiplexed imaging in vivo are demonstrated with the QD microbeads.

3D Printing Personalized, Photocrosslinkable Hydrogel Wound Dressings for the Treatment of Thermal Burns

• 2105932
• Version of Record online: 27 August 2021

Using 3D printing, photocrosslinkable wound dressings fabricated using chitosan methacrylate can be customized with various drugs to provide additional functionalities to the wound dressing for the treatment of thermal burns. Wound dressings fabricated in this process are shown to be biocompatible, biodegradable, sterilizable, and have good antibacterial and wound healing properties.

Enhancement-Mode Field-Effect Transistors and High-Speed Integrated Circuits Based on Aligned Carbon Nanotube Films

Yanxia Lin , Shibo Liang , Lin Xu , Lijun Liu , Qianlan Hu , Chenwei Fan , Yifan Liu , Jie Han , Zhiyong Zhang , Lian-Mao Peng ,

• 2104539
• Version of Record online: 27 August 2021

Although field-effect transistors (FETs) based on aligned carbon nanotube (A-CNT) films are demonstrated, the depletion-mode and poor subthreshold swing bring difficulty in constructing integrated circuits. The gate stack is systematically optimized and enhancement-mode p-type A-CNT FETs are fabricated. The FETs present a real performance exceeding that of commercial Si-based transistors at a similar gate length.

Design of Fire-Resistant Liquid Electrolyte Formulation for Safe and Long-Cycled Lithium-Ion Batteries

• 2106102
• Version of Record online: 27 August 2021

The design of a safe liquid electrolyte formulation via the entire replacement of linear carbonate with fluorinated linear ester and by including solid-electrolyte interphase (SEI)-stabilizing components yields a fire-resistant electrolyte and a safe and outperforming Li-ion battery operating under high voltage, temperature and rates, from which safe and longer-range electric vehicles and energy storage systems are anticipated.

An Integrated Nanoaircraft Carrier Modulating Antitumor Immunity to Enhance Immune Checkpoint Blockade Therapy

Shuang Liang , Yang Liu , Tong Gao , Xiaoqing Liu , Zipeng Zhang , Weiwei Mu , Shunli Fu , Meichen Liu , Yongjun Liu , Na Zhang ,

• 2106123
• Version of Record online: 27 August 2021

A novel integrated nanoaircraft carrier that can co-deliver various therapeutic agents with different physicochemical properties is obtained, which can simultaneously target tumor cells and the immune system. The integrated nanoaircraft carrier eradicates tumor cells, enhances T-cells intratumoral infiltration, and regulates the inhibition of tumor immunosuppressive microenvironment to T-cells, thus enhancing immune checkpoint blockade therapy.

Elucidating the Impact of Mg Substitution on the Properties of NASICON-Na_{3+ y} V_{2− y} Mg _y (PO₄)₃ Cathodes

Subham Ghosh , Nabadyuti Barman , Eliovardo Gonzalez-Correa , Madhulika Mazumder , Aryan Zaveri , Raynald Giovine , Alexis Manche , Swapan K. Pati , Raphaële J. Clément , Premkumar Senguttuvan ,

• 2105463
• Version of Record online: 27 August 2021

A series of NASICON-Na_3+y V_2−y Mg _y (PO₄)₃ (0 ≤ y ≤ 1) cathodes is synthesized, which shows a complex local structural evolution upon progressive Mg²⁺ substitution. Accordingly, these cathodes display changes in their intercalation voltages, sodium (de)intercalation mechanism, and charge/discharge polarization values as y varies.

Conjugated Porous Polymers Based on BODIPY and BOPHY Dyes in Hybrid Heterojunctions for Artificial Photosynthesis

• 2105384
• Version of Record online: 27 August 2021

Artificial photosynthesis is a challenging energy solution for the conversion of sunlight into solar fuels. Hybrid heterostructures, composed of conjugated porous polymers and TiO₂, show remarkable photoactivity toward CO₂ photoreduction and H₂ evolution from water. Photophysical studies reveal the creation of a type II heterojunction that leads to longer carriers' lifetimes and a higher driving force for electron transfer in artificial photosynthesis.

3D Microphysiological System-Inspired Scalable Vascularized Tissue Constructs for Regenerative Medicine

Seokyoung Bang , Dongha Tahk , Young Hwan Choi , Somin Lee , Jungeun Lim , Seung-Ryeol Lee , Byung-Soo Kim , Hong Nam Kim , Nathaniel S. Hwang , Noo Li Jeon ,

• 2105475
• Version of Record online: 26 August 2021

Inspired by microphysiological systems, a 3D printed frame sealed with a PEGDA through-hole porous membrane is developed to fabricate bottom-up and scalable vascularized tissue construct without damage. The vascularized tissue construct, which recapitulates vasculogenesis in vivo, can be transplanted into the ischemic site for the recovery of blood perfusion and limb salvage.

Engineering Natural Pollen Grains as Multifunctional 3D Printing Materials

• 2106276
• Version of Record online: 25 August 2021

A pollen-based microgel suspension is developed that is useful for additive manufacturing and serves multiple functions as follows: 1) functional reinforcement for composite hydrogel inks; and 2) supporting matrix for freeform 3D printing. The use of pollen grains has several advantages such as natural abundance, renewability, affordability, processing ease, monodispersity, and tunable rheological features.

2D Metallic Transition-Metal Dichalcogenides: Structures, Synthesis, Properties, and Applications

• 2105132
• Version of Record online: 21 August 2021

Metallic/semimetallic transition metal dichalcogenides (m-TMDs) have grabbed widespread attention in recent years due to their exotic physical properties and potential applications in various fields. The state-of-the-art progress in m-TMDs is reviewed, including: electronic and crystal structures, synthetic methods, physical properties, and practical applications. Moreover, views on development, challenges, and future prospects of m-TMDs are put forward.

Hybrid Chalcogenide-Germanosilicate Waveguides for High Performance Stimulated Brillouin Scattering Applications

Choon Kong Lai , Duk-Yong Choi , Nicholas J. Athanasios , Kunlun Yan , Wu Yi Chong , Sukanta Debbarma , Harith Ahmad , Benjamin J. Eggleton , Moritz Merklein , Stephen J. Madden ,

• 2105230
• Version of Record online: 21 August 2021

A hybrid chalcogenide-germanosilica waveguide platform is designed and experimentally demonstrated for highly efficient, robust, and reflection-free light coupling. More than 90% fiber-chip coupling efficiency and 0.04% back reflection are obtained. It is anticipated that these results are of great interest as the hybrid chip enables reliable fiber pigtailing to the chip, leading to more robust and practical devices.

Wearable Biofuel Cells: Advances from Fabrication to Application

• 2103976
• Version of Record online: 19 August 2021

Wearable biofuel cells (w-BFCs) are biocompatible, miniaturized, and versatile energy sources that convert chemical energy into electricity. A summary of innovative designs and advanced materials to fabricate w-BFCs is provided. The fascinating applications of w-BFCs in self-powered sensing, on-demand drug delivery, and smart wound dressing are outlined, and current challenges and perspectives in the context of w-BFCs are discussed.

3D Bioprinting Constructs to Facilitate Skin Regeneration

• 2105080
• Version of Record online: 19 August 2021

This review provides an overview of the established platforms for 3D bioprinted skin constructs, especially 3D printed cell-laden platforms for skin regeneration, that successfully reproduce some key features of the skin tissue. Further advances are required for the development of functional and transplantable 3D printed skin structures with a satisfactory degree of tissue restoration to improve clinical outcomes.

Ultra-Shallow All-Epitaxial Aluminum Gate GaAs/Al _x Ga_1−x As Transistors with High Electron Mobility

• 2104213
• Version of Record online: 19 August 2021

Making ever-smaller transistors requires gate electrodes close to the conducting channel. This proximity introduces unwanted scattering of electrons from oxides formed on the semiconductor surface. Here, a new approach is reported in which the metal gate is grown epitaxially on a GaAs/AlGaAs heterostructure to eliminate surface imperfections. This yields nearly perfect single crystal devices with ultra-shallow high mobility electrons.

Cobalt-Nanoporous Carbon Functionalized Nanocomposite-Based Triboelectric Nanogenerator for Contactless and Sustainable Self-Powered Sensor Systems

S. M. Sohel Rana , Md Abu Zahed , M. Toyabur Rahman , M. Salauddin , Sang Hyun Lee , Chani Park , P. Maharjan , T. Bhatta , Kumar Shrestha , Jae Yeong Park ,

• 2105110
• Version of Record online: 16 August 2021

A metal–organic framework-based Co-NPC/Ecoflex nanocomposite is prepared and evaluated as a double layer contactless TENG with a highly negative surface potential, sustainable, and remarkable charge trapping capability. Based on these results, non-contact position monitoring, acceleration, and humidity sensors, obstacle detection, human motion sensors, and smart door lock password authentication are demonstrated.

Photonic Crystal Palette of Binary Block Copolymer Blends for Full Visible Structural Color Encryption

Hongkyu Eoh , Youngdoo Jung , Chanho Park , Chang Eun Lee , Tae Hyun Park , Han Sol Kang , Seungbae Jeon , Du Yeol Ryu , June Huh , Cheolmin Park ,

• 2103697
• Version of Record online: 15 August 2021

A palette of block copolymer (BCP) photonic crystal (PC) inks, enabling convenient modulation of the structural color in the full visible range is developed by solution blending of two different lamellar-forming BCPs. The binary blend PC inks are applicable to various solution processes, offering efficient reflection-mode pattern encryption suitable for emerging encryption technology requiring ultra-thin, mechanically flexible, and thus skin-patchable performance.

Structural Design Variations in Beetle Elytra

Jesus Rivera , Satoshi Murata , Maryam Sadat Hosseini , Adwait A. Trikanad , Robin James , Allison Pickle , Nicholas Yaraghi , Nana Matsumoto , Wen Yang , Dilworth Y. Parkinson , Harold S. Barnard , Pablo Zavattieri , Atsushi Arakaki , David Kisailus ,

• 2106468
• Version of Record online: 15 August 2021

Structure–mechanical property relationships are studied in the protective exoskeletal elytra of flying and terrestrial beetles. Comparison of elytra from two divergent species reveals variations in cuticle density, cuticle thickness, fiber arrangement, and degree of cross-linking resulting in variations in stiffness and fracture behavior. Z-pinning fibers also prevent delamination and improve and enhance toughness.

Biodegradable Implantable Sensors: Materials Design, Fabrication, and Applications

Nureddin Ashammakhi , Ana Lopez Hernandez , Bige Deniz Unluturk , Sergio A. Quintero , Natan Roberto de Barros , Ehsanul Hoque Apu , Abdullah Bin Shams , Serge Ostrovidov , Jinxing Li , Christopher Contag , Antoinette S. Gomes , Miguel Holgado ,

• 2104149
• Version of Record online: 14 August 2021

Development of biodegradable implantable sensors enables real-time and continuous monitoring of various parameters, and helps to obviate the need for sensor removal. Due to recent developments, it became possible to have all sensor components degradable and eliminable through natural body routes. So far, their functionality has been demonstrated in animals, and reports on clinical studies are awaited.

Smart Materials Enabled with Artificial Intelligence for Healthcare Wearables

• 2105482
• Version of Record online: 12 August 2021

Smart materials-based artificial intelligence (AI)-assisted healthcare wearable devices are revolutionizing the healthcare field. This review summarizes the recent advances in smart materials and their applications in healthcare wearables. The aspects of biosensing materials, wearable substrate materials, innovative wearable sensors for health monitoring and AI-assisted data processing and healthcare decision-making are highlighted.

Two-Dimensional Antimony-Based Perovskite-Inspired Materials for High-Performance Self-Powered Photodetectors

• 2106295
• Version of Record online: 12 August 2021

To address the demand for ubiquitous, energy-neutral light sensing, this study investigates for the first time self-powered photodetectors based on 2D antimony-based perovskite-inspired materials. The higher structural dimensionality of these materials enables cutting-edge performance for antimony- and bismuth-based, perovskite-inspired, self-powered photodetectors. Detailed characterization reveals that this performance boost originates from the enhanced optoelectronic properties associated with the 2D structure.

ZnO Nanoplatelets with Controlled Thickness: Atomic Insight into Facet-Specific Bimodal Ligand Binding Using DNP NMR

Michał Terlecki , Saumya Badoni , Michał K. Leszczyński , Stanisław Gierlotka , Iwona Justyniak , Hanako Okuno , Małgorzata Wolska-Pietkiewicz , Daniel Lee , Gaël De Paëpe , Janusz Lewiński ,

• 2105318
• Version of Record online: 11 August 2021

The authors describe herein, the first synthesis of highly stable hexagonal ZnO nanoplatelets with the atomically precise thickness, and by means of dynamic nuclear polarization-enhanced solid-state ¹⁵N NMR, the original bimodal stabilization of the ZnO surface is revealed by the benzamidine ligands, which can bind to both the polar and non-polar facets, acting either as X- or L-type ligands, respectively.

Dielectric Constant Engineering of Organic Semiconductors: Effect of Planarity and Conjugation Length

Wei Jiang , Hui Jin , Mohammad Babazadeh , Alex S. Loch , Aaron Raynor , Neil Mallo , David M. Huang , Xuechen Jiao , Wen Liang Tan , Christopher R. McNeill , Paul L. Burn , Paul E. Shaw ,

• 2104259
• Version of Record online: 11 August 2021

Two isoelectronic families of materials containing dicyanovinylbenzothiadiazoles, one to three units of fluorene or cyclopentadithiophene, and glycol groups are compared. The chromophore planarity and orientation, and film density are found to affect the optical frequency dielectric constant. The dimer with two dicyanovinylbenzothiadiazole and two dithienocyclopentadiene units is found to have the highest optical frequency dielectric constant and overall performance.

Retina-Inspired Structurally Tunable Synaptic Perovskite Nanocones

Kyuho Lee , Hyowon Han , Youngwoo Kim , Jumi Park , Seonghoon Jang , Hyeokjung Lee , Seung Won Lee , HoYeon Kim , Yeeun Kim , Taebin Kim , Dongho Kim , Gunuk Wang , Cheolmin Park ,

• 2105596
• Version of Record online: 07 August 2021

Retina-like artificially intelligent photonic synapses are demonstrated by utilizing position-dependent density tunable photoreceptive perovskite nanoscale cones emulating the human retina with spatial distribution of cones. Arrays of the developed synapses exhibit position-dependent versatile synaptic functions. These unique characteristics enable the demonstrated device array to recognize various visual information with a high degree of accuracy, similar to biological neural networks.

A Flexible Smart Monitoring System for the Conservation of Textile Relics

• 2106088
• Version of Record online: 06 August 2021

An innovative textile-based monitoring system, which is formed by waving pH, strain, humidity, temperature and UV light sensing fibers into an electrochemical fabric, is proposed to provide a reliable and integrated solution for the conservation of textile relics using integrated cultural preservation and smart textile technology.

Resonant Dielectric Metagratings for Response Intensified Optical Sensing

Rifat Ahmmed Aoni , Shridhar Manjunath , Buddini I. Karawdeniya , Khosro Zangeneh Kamali , Lei Xu , Adam M. Damry , Colin J. Jackson , Antonio Tricoli , Andrey E. Miroshnichenko , Mohsen Rahmani , Dragomir N. Neshev ,

• 2103143
• Version of Record online: 04 August 2021

A novel optical-sensing concept based on diffraction measurements from resonant dielectric metagratings is proposed and experimentally demonstrated. This approach enables the direct measurement of unknown analytes with enhanced sensitivity and without the need for intensity calibrations. The proposed resonant metagrating exhibits a limit of detection for anti-mouse Immunoglobulin G of ≈770 femtomolar, opening new opportunities for miniaturized sensing devices.

Surface Engineering of Carbon via Coupled Porosity Tuning and Heteroatom-Doping for High-Performance Flexible Fibrous Supercapacitors

• 2104256
• Version of Record online: 03 August 2021

The high-performance flexible fibrous supercapacitors are realized by surface engineering of carbon via coupled porosity tuning and heteroatom-doping. The synergistic effect of mesoporous structure and heteroatom-doping for microscale carbon electrodes can facilitate the interface between the gel-type electrolyte and the electrode and thus provide outstanding electrochemical performance. These results provide excellent opportunities to establish new generation wearable electronics.

Enhancement of Reverse Intersystem Crossing in Charge-Transfer Molecule through Internal Heavy Atom Effect

• 2104646
• Version of Record online: 03 August 2021

This study explores how incorporating the internal heavy atom (IHA) effect can impact the reverse intersystem crossing (RISC) and device performance. The spectroscopic and theoretical results indicate that a fast RISC may not be the sole factor important for reducing efficiency roll-off and that the spin-flip cycles should be carefully considered to derive a complete picture of the IHA effect.

Organic Light-Emitting Transistors in a Smart-Integrated System for Plasmonic-Based Sensing

Mario Prosa , Emilia Benvenuti , David Kallweit , Paola Pellacani , Michael Toerker , Margherita Bolognesi , Laura Lopez-Sanchez , Vincenzo Ragona , Franco Marabelli , Stefano Toffanin ,

• 2104927
• Version of Record online: 01 August 2021

The angle-dependent sensing characteristics of a nanostructured grating are enabled by an organic photonic device with unprecedented proximity of the light source and the light detection regions, provided by the smart integration of an organic photodiode onto a planar organic light-emitting transistor. An advanced simulation tool allows unraveling the best layout of integration to obtain a miniaturized plasmonic sensor.

Designer Glasses—Future of Photonic Device Platforms

• 2103103
• Version of Record online: 01 August 2021

Foreordained inclusion of key atomic elements in a purpose designed glass helps to achieve unprecedented control over the ultrafast laser written waveguide morphology and refractive index change. Viscosity, aluminium to alkaline earth+alkali ratio, and total silicon content within the glass are tuned to design waveguides with high circularity and refractive index change with superfast feed rates.

Organic Semiconductor Nanotubes for Electrochemical Devices

• 2105358
• Version of Record online: 30 July 2021

Electrochemical actuators have numerous applications ranging from soft robotics to biomedical devices. However, the design of durable and fast responsive actuators with large deformations operating in liquid remains a challenge. Here, a high-performance device based on organic semiconductor nanotubes that exhibits very low power consumption/strain, large deformations, fast responses, and excellent actuation stability in liquid and gel-polymer electrolytes is presented.

3D-Printed Wearable Electrochemical Energy Devices

• 2103092
• Version of Record online: 29 July 2021

Wearable electrochemical energy devices are regarded as a promising candidate for power sources for next-generation wearable electronics. This review summarizes 3D printing parameters, inks selection criteria and current challenges in the aspect of 3D printing wearable thermocells, 3D printing batteries, and 3D printing supercapacitors, hoping to benefit future wearable electrochemical energy devices and promote the development of self-powered wearable systems.

Trimodal Sono/Photoinduced Focal Therapy for Localized Prostate Cancer: Single-Drug-Based Nanosensitizer under Dual-Activation

DanRong Hu , Meng Pan , Yun Yang , Ao Sun , Yu Chen , LiPing Yuan , KangKang Huang , Ying Qu , ChengQi He , Quan Wei , ZhiYong Qian ,

• 2104473
• Version of Record online: 28 July 2021

Herein, a novel and straightforward approach is reported for constructing a polysaccharide-based nanoprodrug to achieve synergistic sono/photoinduced trimodal focal therapy (sonodynamic therapy/photodynamic therapy/photothermal therapy) against localized prostate cancer. Given the underlying synergy of sono- and phototherapy, the constructed chondroitin sulfate-ss-IR806 nanoparticles show superior anticancer efficacy with fewer side effects in the case of a markedly low administration dosage.

Stem Cell-Recruiting Injectable Microgels for Repairing Osteoarthritis

Yiting Lei , Yuping Wang , Jieliang Shen , Zhengwei Cai , Yongsheng Zeng , Piao Zhao , Junyi Liao , Chengjie Lian , Ning Hu , Xiaoji Luo , Wenguo Cui , Wei Huang ,

• 2105084
• Version of Record online: 17 July 2021

Inspired by the phenomenon where islands can recruit seabirds for nesting, the injectable porous microgel (MG) generated via microfluidic technology is non-covalently loaded with platelet-derived growth factor-BB and transforming growth factor-beta3, forming "cell island" MGs that can serve as a temporary "nest site" to recruit endogenous stem cells, and present a promising therapeutic effect for osteoarthritic cartilage damage.

A New Strategy for Selective Area Growth of Highly Uniform InGaAs/InP Multiple Quantum Well Nanowire Arrays for Optoelectronic Device Applications

Fanlu Zhang , Xutao Zhang , Ziyuan Li , Ruixuan Yi , Zhe Li , Naiyin Wang , Xiaoxue Xu , Zahra Azimi , Li Li , Mykhaylo Lysevych , Xuetao Gan , Yuerui Lu , Hark Hoe Tan , Chennupati Jagadish , Lan Fu ,

• 2103057
• Version of Record online: 02 July 2021

A new facet engineering strategy is proposed to achieve the epitaxial growth of highly uniform InGaAs/InP multiple quantum well nanowires. The nanowires exhibit low threshold optically pumped lasing at room temperature and are fabricated into broadband photodetectors with high responsivity and fast response time. Such a growth strategy can pave the way for a wide range of nanoscale optoelectronic applications.

Electric Current Aligning Component Units during Graphene Fiber Joule Heating

Yi Cheng , Guang Cui , Changhao Liu , Zhetong Liu , Longge Yan , Bingyao Liu , Hao Yuan , Pengcheng Shi , Jun Jiang , Kewen Huang , Kun Wang , Shuting Cheng , Junliang Li , Peng Gao , Xinfang Zhang , Yue Qi , Zhongfan Liu ,

• 2103493
• Version of Record online: 23 June 2021

A dynamic joule heating system is designed, enabling the ultrafast and continuous fabrication of graphene fibers with a high-temperature treating time of ≈20 min. Innovatively, the current-induced electric field is first utilized to adjust the conformation order of graphene sheets and thus improves the electrical and mechanical properties of as-fabricated graphene fibers.

Next Generation Cell Culture Tools Featuring Micro- and Nanotopographies for Biological Screening

James Carthew , Hazem H. Abdelmaksoud , Karla J. Cowley , Margeaux Hodgson-Garms , Roey Elnathan , Joachim P. Spatz , Juergen Brugger , Helmut Thissen , Kaylene J. Simpson , Nicolas H. Voelcker , Jessica E. Frith , Victor J. Cadarso ,

• 2100881
• Version of Record online: 21 April 2021

A novel technology to fabricate micro/nanoscaled topographies directly in the base of conventional cell cultureware, retaining its original chemical, mechanical, and optical properties, is presented. This platform's compatibility with standardized biological techniques and methods of analysis is exemplified by high-throughput screening five distinct cell types across 12 surface topographies, demonstrating unique cell-specific responses across the selected topographies.

Origin of Efficiency and Stability Enhancement in High-Performing Mixed Dimensional 2D-3D Perovskite Solar Cells: A Review

Md Arafat Mahmud , The Duong , Jun Peng , Yiliang Wu , Heping Shen , Daniel Walter , Hieu T. Nguyen , Naeimeh Mozaffari , Grace Dansoa Tabi , Kylie R. Catchpole , Klaus J. Weber , Thomas P. White ,

• 2009164
• Version of Record online: 31 March 2021

This work presents a comprehensive review on the current understanding, and apparent contradictions, of experimental observation, interpretation, and theoretical hypotheses presented in the state-of-the-art mixed dimensional 2D-3D perovskite literature and identifies promising future research directions for enhancing the stability and performance of such devices.

A Silk-Based Functionalization Architecture for Single Fiber Imaging and Sensing

Patrick K. Capon , Jiawen Li , Aimee J. Horsfall , Suliman Yagoub , Erik P. Schartner , Asma Khalid , Rodney W. Kirk , Malcolm S. Purdey , Kylie R. Dunning , Robert A. McLaughlin , Andrew D. Abell ,

• 2010713
• Version of Record online: 29 March 2021

A new architecture is presented for coating optical fibers. A silk-binding peptide anchors a fluorescent pH sensor to the silk fibroin coated fiber, which allows dual depth-resolved imaging through optical coherence tomography (OCT) and pH sensing. These new probes are demonstrated in an in vitro fertilization setting to perform dual OCT imaging and pH sensing on cumulus-oocyte complexes.

Transdermal Electrochemical Monitoring of Glucose via High-Density Silicon Microneedle Array Patch

• 2009850
• Version of Record online: 04 March 2021

High-density microneedle arrays are used for the construction of a minimally invasive, skin-interfaced biosensor. The three-electrode system is designed to painlessly interface interstitial fluids and to monitor glucose levels via electrochemical measurements. The microneedle patch shows an excellent analytical performance in physiologically relevant conditions, which is validated in vivo in a mouse model.

Bimodal Plasmonic Color Filters Enable Direct Optical Imaging of Ion Implantation in Thin Films

• 2009419
• Version of Record online: 04 February 2021

A bimodal plasmonic color filter is applied to the detection of gallium ion implantation in titanium oxide. This method of characterizing the optoelectronic properties of ultra-thin layers offers significant flexibility and ease-of-use compared to current approaches. The technique can be applied to a wide-range of different types of thin-film characterization based on changes in the optical output of the sensor.

Mini Origami on the Flip Side Duy Nguyen

Source: https://onlinelibrary.wiley.com/toc/16163028/0/0

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