• Issue
    Volume 32, Issue 1
    January 3, 2022

Cover Picture

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3D Microphysiological System-Inspired Scalable Vascularized Tissue Constructs for Regenerative Medicine (Adv. Funct. Mater. 1/2022)

  • First Published: 03 January 2022
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Vascularized Tissue Constructs

In article number 2105475, Hong Nam Kim, Nathaniel S. Hwang, Noo Li Jeon, and co-workers report a scalable method for engineering vascularized tissue constructs inspired by the vasculogenesis-induction method and its application in ischemic tissue regeneration.

Inside Front Cover

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Selective Vertical and Horizontal Growth of 2D WS2 Revealed by In Situ Thermolysis using Transmission Electron Microscopy (Adv. Funct. Mater. 1/2022)

  • First Published: 03 January 2022
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2D Growth Mechanisms

In article number 2106450, Dnyaneshwar S. Gavhane, Marijn A. van Huis, and Atul D. Sontakke visualize the growth of 2D WS2 in real time and at atomic resolution via in situ transmission electron microscopy. Growth of either vertical or horizontal layers dependent on precursor thickness is observed. Covering substrates beforehand with platinum or gold enhances the growth with elongated vertical layers and horizontal twisted bilayers of WS2.

Inside Back Cover

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Photonic Crystal Palette of Binary Block Copolymer Blends for Full Visible Structural Color Encryption (Adv. Funct. Mater. 1/2022)

  • First Published: 03 January 2022
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Block Copolymer Blends

In article number 2103697, Cheolmin Park and co-workers develop a palette of block copolymer photonic crystal inks, enabling convenient modulation of the structural color in the full visible range via solution blending of two lamellar-forming block copolymers. The binary blend photonic crystals are applicable to various solution processes and offer efficient reflection-mode pattern encryption suitable for emerging vision encryption technology requiring ultra-thin, mechanically flexible, and thus skin-patchable performance.

Back Cover

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Eco-Friendly Colorimetric Nanofiber Design: Halochromic Sensors with Tunable pH-Sensing Regime Based on 2-Ethyl-2-Oxazoline and 2-n-Butyl-2-Oxazoline Statistical Copolymers Functionalized with Alizarin Yellow R (Adv. Funct. Mater. 1/2022)

  • First Published: 03 January 2022
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Eco-Friendly Electrospinning

In article number 2106859, Richard Hoogenboom, Karen De Clerck, and co-workers show that functionalization and electrospinning of 2-ethyl-2-oxazoline and 2-n-butyl-2-oxazoline statistical copolymers with alizarin yellow R (AYR) analogues leads to eco-friendly designed halochromic nanofibrous sensors of which responsivity, stability, sensitivity, and pH-response can be tuned by varying support copolymer and AYR-modified polymer chain length, resulting in user-friendly reusable sensors for sub-ppm detection of biogenic amines applicable in breath analysis or food packaging.

Masthead

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Masthead: (Adv. Funct. Mater. 1/2022)

  • First Published: 03 January 2022

Editorial

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Progress in a Time Loop

  • First Published: 03 January 2022

Perspectives

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Building a Library for Catalysts Research Using High-Throughput Approaches

  • First Published: 23 September 2021
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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.

Reviews

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

  • First Published: 23 September 2021
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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.

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

  • First Published: 30 September 2021
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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.

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Facet Junction Engineering for Photocatalysis: A Comprehensive Review on Elementary Knowledge, Facet-Synergistic Mechanisms, Functional Modifications, and Future Perspectives

  • First Published: 04 October 2021
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Facet junction (also called facet heterojunction or surface heterojunction) is defined as a complex polyhedral single crystal exposed to two, three, or four types of crystallographic planes. In this review, facet junction engineering for photocatalysts is overviewed based on elementary knowledge, facet-synergistic mechanisms, and functional modifications. Several challenges and perspectives are discussed.

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Polymeric Toroidal Self-Assemblies: Diverse Formation Mechanisms and Functions

  • First Published: 05 October 2021
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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.

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Innovative Materials Science via Machine Learning

  • First Published: 04 October 2021
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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.

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Advanced Electron Energy Loss Spectroscopy for Battery Studies

  • First Published: 24 September 2021
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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.

Research Articles

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3D Microphysiological System-Inspired Scalable Vascularized Tissue Constructs for Regenerative Medicine

  • First Published: 26 August 2021
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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.

Open Access

Selective Vertical and Horizontal Growth of 2D WS2 Revealed by In Situ Thermolysis using Transmission Electron Microscopy

  • First Published: 20 October 2021
Description unavailable

The growth dynamics of 2D WS2 is visualized in real time and at atomic resolution through in situ transmission electron microscopy. Growth of either vertical or horizontal layers dependent on the precursor thickness is observed. Covering substrates with platinum (Pt) and gold (Au) much improve the growth with elongated vertical layers and twisted WS2 horizontal layers.

Free to Read

Photonic Crystal Palette of Binary Block Copolymer Blends for Full Visible Structural Color Encryption

  • First Published: 15 August 2021
Description unavailable

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.

Free to Read

Eco-Friendly Colorimetric Nanofiber Design: Halochromic Sensors with Tunable pH-Sensing Regime Based on 2-Ethyl-2-Oxazoline and 2-n-Butyl-2-Oxazoline Statistical Copolymers Functionalized with Alizarin Yellow R

  • First Published: 05 September 2021
Description unavailable

Functionalization and electrospinning of 2-ethyl-2-oxazoline and 2-n-butyl-2-oxazoline statistical copolymers with alizarin yellow R analogs leads to eco-friendly designed halochromic nanofibrous sensors of which responsivity, sensitivity, and pH-response regime can be tuned by variation of support copolymer and dye-modified polymer chain length, resulting in user-friendly reusable sensors for sub-ppm detection of biogenic amines applicable in breath analysis or food packaging.

Frontispiece

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Metal Micropatterning by Triboelectric Spark Discharge (Adv. Funct. Mater. 1/2022)

  • First Published: 03 January 2022
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Metal Micropatterning

In article number 2109265, Xiangming Li and co-workers present controllable and safe spark discharges generated by a triboelectric nanogenerator under atmosphere and offer a simple, reliable, and versatile metal micropatterning method for flexible electronics.

Research Articles

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Metal Micropatterning by Triboelectric Spark Discharge

  • First Published: 05 November 2021
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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.

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Excellent Specific Mechanical and Electrical Properties of Anisotropic Freeze-Cast Native and Carbonized Bacterial Cellulose-Alginate Foams

  • First Published: 28 September 2021
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Native and carbonized freeze-cast bacterial-cellulose-alginate foams possess a unique honeycomb-like architecture with two levels of porosity (20–50 μm diameter pores between, 0.01–10 μm diameter pores within the cell-walls) and have remarkable properties. The modulus of the native and the electrical conductivity of the carbonized foams of 646.2 kPa and 1.68 S cm−1, respectively, are high for their density.

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Compensated Ferrimagnet Based Artificial Synapse and Neuron for Ultrafast Neuromorphic Computing

  • First Published: 29 September 2021
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By using compensated ferrimagnet of composition Co0.80Gd0.20 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.

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Dual-Modal Optoelectronic Synaptic Devices with Versatile Synaptic Plasticity

  • First Published: 29 September 2021
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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.

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

  • First Published: 01 October 2021
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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.

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

  • First Published: 29 September 2021
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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.

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Architected Multimaterial Lattices with Thermally Programmable Mechanical Response

  • First Published: 29 September 2021
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A generalized framework for programming multimaterial lattices is reported. By co-printing thermally active and passive materials on triangular lattices, architectures that can fundamentally change their stiffness, Poisson's ratio, and deformation mode are created.

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

  • First Published: 29 September 2021
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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.

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

  • First Published: 29 September 2021
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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.

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

  • First Published: 29 September 2021
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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.

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

  • First Published: 01 October 2021
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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.

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Aramid Nanofiber Membranes for Energy Harvesting from Proton Gradients

  • First Published: 01 October 2021
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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.

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

  • First Published: 01 October 2021
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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%.

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

  • First Published: 01 October 2021
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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.

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Sn Alloying to Inhibit Hydrogen Evolution of Zn Metal Anode in Rechargeable Aqueous Batteries

  • First Published: 01 October 2021
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A Sn alloying approach is demonstrated to effectively inhibit hydrogen evolution and dendrite growth in the Zn metal anode, which is evidenced by precisely quantitative in situ measurement of the hydrogen production during the repeated Zn plating/stripping process.

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TRAIL Coated Genetically Engineered Immunotherapeutic Nano-Ghosts Vesicles Target Human Melanoma-Avoiding the Need for High Effective Therapeutic Concentration of TRAIL

  • First Published: 01 October 2021
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In this work, unique, versatile, inanimate, and broadly applicable nanovesicles, termed immunotherapeutic-nano-ghosts (iNGs) are developed. The iNGs are armed with inherent surface-associated targeting and therapeutic capabilities in which the promise and benefits of mesenchymal-stem-cells therapy and T cell immunotherapy are combined into one. The iNGs target and inhibit tumor growth, while avoiding the need for a highly effective therapeutic concentration.

Open Access

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

  • First Published: 01 October 2021
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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.

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

  • First Published: 01 October 2021
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A-site deficient perovskite Li0.1La0.3NbO3 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.

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

  • First Published: 01 October 2021
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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.

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

  • First Published: 03 October 2021
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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.

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Multifunctional and Physically Transient Supercapacitors, Triboelectric Nanogenerators, and Capacitive Sensors

  • First Published: 03 October 2021
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Transient multifunctional all-PVA based T-SUPC, T-TENG, and T-CAPS are fabricated. T-SUPC showed a specific capacitance of 2.62 F g−1 with excellent rate capability up to 10 V s−1. T-TENG showed an EOC, ESC, and power density of 21.6 V, 4.6 µA, and 2.2 mW m−2. T-CAPS showed a sensitivity of 0.69 kPa−1 with long linear sensing range.

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

  • First Published: 01 October 2021
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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.

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

  • First Published: 03 October 2021
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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.

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

  • First Published: 01 October 2021
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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.

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

  • First Published: 01 October 2021
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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%.

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

  • First Published: 04 October 2021
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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.

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

  • First Published: 01 October 2021
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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.

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Rational Design of All Resistive Multifunctional Sensors with Stimulus Discriminability

  • First Published: 05 October 2021
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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.

Free to Read

Lossless, Passive Transportation of Low Surface Tension Liquids Induced by Patterned Omniphobic Liquidlike Polymer Brushes

  • First Published: 03 October 2021
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Liquidlike omniphobic polymer brushes are used to pattern smooth surfaces with channels that transport both polar and nonpolar low surface tension liquids at large distances, passively and without fluid loss. Such channels perform many complex fluidic tasks, such as droplet splitting, mixing, moving along nonlinear pathways, and even stable dropwise condensate collection of low surface tension liquids on horizontal surfaces.

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Lithiothermic-Synchronous Construction of Mo-Li2S-Graphene Nanocomposites for High-Energy Li2S//SiC Battery

  • First Published: 04 October 2021
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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 LiS batteries and S-based Li-ion batteries.

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Combined Methylglyoxal Scavenger and Collagen Hydrogel Therapy Prevents Adverse Remodeling and Improves Cardiac Function Post-Myocardial Infarction

  • First Published: 12 October 2021
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A combination of the antioxidant fisetin with a collagen hydrogel is used to treat MI. The treatment decreases MG-related oxidative stress and protects the myocardium through stimulating the activity of Nrf2, Glo1, and GSH, which are known to contribute to MG detoxification. This constitutes a new therapeutic approach to limit damage and improve cardiac function after MI.

Free to Read

Unraveling the Charge Storage and Activity-Enhancing Mechanisms of Zn-Doping Perovskite Fluorides and Engineering the Electrodes and Electrolytes for Wide-Temperature Aqueous Supercabatteries

  • First Published: 14 October 2021
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A Zn-doping perovskite fluoride (ABF3) (K–Ni–Co–Zn–F) is explored for aqueous (alkaline) supercabatteries (ASCBs), showing a typical bulk phase conversion mechanism for charge storage with the transition of ABF3 perovskite nanocrystals into amorphous metal oxides/(oxy)hydroxides nanosheets. Redox-inert Zn largely enhances the activity of redox-active Ni/Co owing to the promotion of electroactive sites, OH adsorption, and charge transfer of surface Ni/Co atoms.

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

  • First Published: 22 October 2021
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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.

Open Access

Inkjet Printed Disposable High-Rate On-Paper Microsupercapacitors

  • First Published: 22 October 2021
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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.