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Multimaterial thermally drawn fibers are becoming important building blocks in several foreseen applications in surgical probes, protective gears, or medical textiles. Here, the influence of the thermal drawing parameters on the degree of polymer chain orientation, the related thermal shrinkage behavior, and the mechanical properties of the final fibers is investigated via thermo–mechanical testing...
Stress Engineering
In article number 2105748, Hoang‐Phuong Phan and co‐workers summarize state‐of‐the‐art technologies in stress engineering for the development of innovative 3D micro‐ and nano‐architectures. A broad range of applications including sensors, optical systems, bioelectronics interfaces, micro robots, and implantable and wearable devices are highlighted.
Hybrid Materials
In article number 2104628, Demetrios D. Chronopoulos, Kolleboyina Jayaramulu, Michal Otyepka, and co‐workers review the integration of carbon nanotubes with metal–organic frameworks into hybrid materials with augmented properties, otherwise difficult to accomplish by a single class of materials. The authors map the growth, structure, synthetic strategies, properties, and specific...
Transformation of conventional 2D platforms into unusual 3D configurations provides exciting opportunities for sensors, electronics, optical devices, and biological systems. Engineering material properties or controlling and modulating stresses in thin films to pop‐up 3D structures out of standard planar surfaces has been a highly active research topic over the last decade. Implementation of 3D micro...
Multi‐resonance thermally activated delayed fluorescence (MR‐TADF) material, which possesses the ability to achieve narrowband emission in organic light‐emitting diodes (OLEDs), is of significant importance for wide color gamut and high‐resolution display applications. To date, MR‐TADF material with narrow full width at half‐maximum (FWHM) below 0.14 eV still remains a great challenge. Herein, through...
For expanding the applications of 2D transition metal dichalcogenides (TMDCs), integrating functional devices with diverse conduction polarities in the same parent material is a very promising direction. Improving the contact issue at the metal‐semiconductor interface also holds fundamental significance. To achieve these concurrently, step‐like Cr2S3 vertical stacks with varied thicknesses are achieved...
Herein, a heterostructural hexagonal@tetragonal GeO2 (HT‐GeO2) composite has been designed based on density functional theory (DFT) calculations and synthesized via an acidic‐heating route dealt with rapid cooling, where the inner hexagonal GeO2 (H‐GeO2) phase is covered by a porous layer of tetragonal GeO2 (T‐GeO2) owing to HF etching. Interestingly, the HT‐GeO2 electrode has a self‐optimizing effect...
Rechargeable aqueous zinc ion batteries (ZIBs) represent a promising technology for large‐scale energy storage due to their high capacity, intrinsic safety and low cost. However, Zn anodes suffer from poor reversibility and cycling stability caused by the side‐reactions and dendrite issues, which limit the Zn utilization in the ZIBs. Herein, to improve the durability of Zn under high utilization,...
Microwave Absorption
In article number 2107265, Xuefeng Zhang, and co‐workers synthesize core@shell structural high‐entropy‐alloy@graphite (HEA@C) nanocapsules through an in‐situ arc‐discharged plasma approach. By changing the combinations of various transition elements of HEA cores, the optimized impedance matching, and improved interfacial polarization can be constructed, achieving significant microwave...
Ferroelectric thin film capacitors have attracted increasing attention because of their high energy storage density and fast charge–discharge speed, but less attention has been paid to the realization of flexible capacitors for wearable electronics and power systems. In this work, flexible xMn‐BiMg0.5Ti0.7O3 (xMn‐BMT0.7) thin film capacitors with ultrahigh energy storage density and good stability...
The 2D/2D layered materials are gaining much‐needed attention owing to the unprecedented results in supercapacitors by their robust structural and electrochemical compatibility. Here, a facile scalable synthesis of 2D/2D MXene/boron carbon nitride (BCN) heterostructure through no residue direct pyrolysis is reported. The process allows the in‐situ growth of BCN nanosheets unravelling the surfaces...
Designing heterogeneous interfaces and components at the nanoscale is proven effective for optimizing electromagnetic wave absorption and shielding properties, which can achieve desirable dielectric polarization and ferromagnetic resonances. However, it remains a challenge for the precise control of components and microstructures via an efficient synthesis approach. Here, the arc‐discharged plasma...
Hydrogen economy is imagined where excess electric energy from renewable sources stored directly by electrochemical water splitting into hydrogen is later used as clean hydrogen fuel. Electrocatalysts with the superhigh current density (1000 mA cm−2‐level) and long‐term durability (over 1000 h), especially at low overpotentials (<300 mV), seem extremely critical for green hydrogen from experiment...
High‐performance photothermal theranostics is urgently desired for cancer therapy because of their good controllability and noninvasive features. The relatively low photothermal conversion efficiency is still at the drawbacks because of the absence of efficient extraneous carriers. Herein, a carrier‐free nanomedicine is developed to in vivo self‐deliver organic photothermal agents for efficient cancer...
Metal–organic frameworks (MOFs) materials constructed by the coordination chemistry of metal ions and organic ligands are important members of the crystalline materials family. Owing to their exceptional properties, for example, high porosity, tunable pore size, and large surface area, MOFs have been applied in several fields such as gas or liquid adsorbents, sensors, batteries, and supercapacitors...
Although the rapid development of polymer solar cells (PSCs) has been achieved, it is still a great challenge to explore efficient ways for improving power conversion efficiency (PCE) of PSCs from materials and device engineering. Ternary strategy has been confirmed as an efficient way to improve PCE of PSCs by employing three kinds of materials. In this work, one polymer donor PM6, and two non‐fullerene...
Fungal keratitis (FK) remains a serious clinical problem worldwide, so the ultimate goal of the treatment is to develop a minimally invasive, safe, and effective method for ocular drug delivery. Here, a minimally invasive delivery system is reported for treating FK by using a dissolving microneedle (MN)‐array patch based on Poly(D,L‐lactide) (PLA) and hyaluronic acid (HA). By altering the concentration...
Currently, nucleic acid aptamers are exploited as robust targeting ligands in the biomedical field, due to their specific molecular recognition, little immunogenicity, low cost, ect. Thanks to the facile chemical modification and high hydrophilicity, aptamers can be site‐specifically linked with hydrophobic moieties to prepare aptamer‐organic amphiphiles (AOAs), which spontaneously assemble into aptamer‐organic...
Pt‐based catalysts are currently the most efficient electrocatalysts for the hydrogen evolution reaction (HER), but the scarcity and high cost of Pt limit industrial applications. Downsizing Pt nanoparticles (NPs) to single atoms (SAs) can expose more active sites and increase atomic utilization, thus decreasing the cost. Here, a solar‐irradiation strategy is used to prepare hybrid SA‐Pt/MoS2 nanosheets...
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