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Copper is a vital micronutrient for lives and an important ingredient for bactericides and fungicides. Given its indispensable biological and agricultural roles, there is an urgent need to develop simple, affordable, and reliable methods for detecting copper in complicated matrixes, particularly in underdeveloped regions where costly standardized instruments and sample dilution procedures hinder progress...
Liquid Metal Nanoparticles
In article number 2306652, Guozhen Liu and co‐workers introduce the development of gold‐decorated EGaIn nanodroplets by reaction of p‐aniline ligand modified EGaIn nanoparticles with HAuCl4. Concentrations of HAuCl4 or p‐aniline ligand affect the morphology and performance of the EGaIn nanodroplets. P‐aminobenzoic acid modified EGaIn offers the most evenly distributed Au...
Gallium‐based liquid metal systems hold vast potential in materials science. However, maximizing their possibilities is hindered by gallium's native oxide and interfacial functionalization. In this study, small‐molecule ligands are adopted as surfactants to modify the surface of eutectic gallium indium (EGaIn) nanoparticles and suppress oxidation. Different p‐aniline derivatives are explored. Next,...
Transition metal nitrides (TMNs) are promising electrode materials for use in high‐performance electrochemical energy storage devices due to their unique properties, which include a high conductivity, pseudocapacitance, and energy density. However, structural instability during electrochemical reactions has limited their practical deployment for energy storage devices. In this context, the present...
Complete ethanol oxidation reaction (EOR) in C1 pathway with 12 transferred electrons is highly desirable yet challenging in direct ethanol fuel cells. Herein, PtRh jagged nanowires synthesized via a simple wet‐chemical approach exhibit exceptional EOR mass activity of 1.63 A mgPt−1 and specific activity of 4.07 mA cm−2, 3.62‐fold and 4.28‐folds increments relative to Pt/C, respectively. High proportions...
Unclear reaction mechanisms and unsatisfactory power performance hinder the further development of advanced lithium/fluorinated carbon (Li/CFx) batteries. Herein, the mechano‐electrochemical coupling behavior of a CFx cathode is investigated by in situ monitoring strain/stress using digital image correlation (DIC) techniques, electrochemical methods, and theoretical equations. The DIC monitoring results...
In this study, a nematic phase structure is incorporated into polybenzoxazine to increase its thermal conductivity. A simple route for the synthesis of a thermally conductive polybenzoxazine containing liquid crystalline (LC) structure by grafting oligomeric p‐sulfophenylene‐terephthalamide (PSTA) is offered. Benzoxazine monomer of pHBA‐da is synthesized via Mannich reaction of p‐hydroxy benzoic acid,...
2D semiconductors (2SEM) can transform many sectors, from information and communication technology to healthcare. To date, top‐down approaches to their fabrication, such as exfoliation of bulk crystals by “scotch‐tape,” are widely used, but have limited prospects for precise engineering of functionalities and scalability. Here, a bottom‐up technique based on epitaxy is used to demonstrate high‐quality,...
Epitaxy growth and mechanical transfer of high‐quality III‐nitrides using 2D materials, weakly bonded by van der Waals force, becomes an important technology for semiconductor industry. In this work, wafer‐scale transferrable GaN epilayer with low dislocation density is successfully achieved through AlN/h‐BN composite buffer layer and its application in flexible InGaN‐based light‐emitting diodes (LEDs)...
Stimulus‐responsive mode is highly desirable for improving the precise monitoring and physiological efficacy of endogenous biomarkers (EB). However, its integrated application for visual detection and therapy is limited by inappropriate use of responsive triggers and poor delivery of EB signal‐transducing agents, which remain challenging in simultaneous monitoring and noninvasive therapy of EB and...
Video‐rate atomic force microscopy (AFM) is used to study the near‐surface nanostructure dynamics of the ionic liquid ethylammonium nitrate (EAN) at a highly oriented pyrolytic graphite (HOPG) electrode as a function of potential in real‐time for the first time. The effects of varying the surface potential and adding 10 wt% water on the nanostructure diffusion coefficient are probed. For both EAN...
Biofilm is a spatially organized community formed by the accumulation of both microorganisms and their secretions, leading to persistent and chronic infections because of high resistance toward conventional antibiotics. In view of the tunable physicochemical properties and the related unique biological behavior (e.g., size‐, shape‐, and surface charge‐dependent penetration, protein corona endowed...
Combining the methanol oxidation reaction (MOR) and hydrogen evolution reaction (HER) within an integrated electrolytic system may offer the advantages of enhanced kinetics of the anode, reduced energy consumption, and the production of high‐purity hydrogen. Herein, it is reported the construction of Ni─MoN nanorod arrays supported on a nickel foam substrate (Ni─MoN/NF) as a bifunctional electrocatalyst...
Aqueous alkaline Zn‐based batteries (AAZBs) possess great promise for large‐scale applications thanks to their higher discharging plateau and unique reaction mechanism. However, the capacity and rate capability of Ni‐based cathodes are still unsatisfactory due to their insufficient OH− adsorption and diffusion ability. Herein, heterostructured Ni3S2/Ni(OH)2 nanosheets with outstanding electrochemical...
γ‐valerolactone (GVL) is a key value‐added chemical catalytically produced from levulinic acid (LA), an important biomass derivative platform chemical. Here an ultra‐efficient 3D Ru catalyst generated by in situ reduction of RuZnOx nanoboxes is reported; the catalyst features a well‐defined structure of highly dispersed in situ oxide‐derived Ru (IOD‐Ru) clusters (≈1 nm in size) spatially confined...
Semiconducting nanocrystals have attracted world‐wide research interest in artificial photosynthesis due to their appealing properties and enticing potentials in converting solar energy into valuable chemicals. Compared to 0D nanoparticles, 1D nanorods afford long‐distance charge carriers separation and extended charge carriers lifetime due to the release of quantum confinement in axial direction...
Light‐Emitting Diodes
In article number 2306132, Tongbo Wei and co‐workers demonstrate a pioneering technology for growing 3D semiconductor films on 2D materials, namely van der Waals epitaxy, which both relaxes the lattice and thermal matching requirements between the epilayer and substrate, and enables the exfoliation of epilayers for flexible optoelectronic devices, such as flexible displays.
Polymer Vesicles
In article number 2306219, Daniela A. Wilson and co‐workers report the programmable engineering of compartment networks achieved through the stress‐dependent deformation of polymer vesicles. Polymer vesicles can be transformed through either a tubulation pathway by applying mild osmotic stress or through a deflation pathway by applying an osmotic shock. The stress dependency enables...
Although the layered vanadium oxide‐based materials have been considered to be one of the candidates for aqueous Zn‐ion batteries (AZIBs), it still faces inevitable challenges of unsatisfactory capacities and sluggish kinetics because of strong electrostatic interactions between Zn‐ions and structure lattice. This work addresses the strategy of pre‐inserting guest materials to vanadium oxide cathode...
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