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The piezoelectric property of van der Waals materials is difficult to be collected and quantified experimentally. In article number 1903106, Zhigao Hu and co‐workers present an efficient scanning probe method to quantify the effective out‐of‐plane electromechanical coupling response on 2D layered materials including MoS2 and InSe by a free‐standing designation.
Room‐temperature operating means a profound reduction of volume, power consumption, and cost for infrared (IR) photodetectors, which promise a wide range of applications in both military and civilian areas, including individual soldier equipment, automatic driving, etc. Inspired by this fact, since the beginning of 1990s, great efforts have been made in the development of uncooled thermal detectors...
Electrochemical reactions represent a promising approach to control magnetization via electric fields. Favorable reaction kinetics have made nanoporous materials particularly interesting for magnetic tuning experiments. A fully reversible ON and OFF switching of magnetism in nanoporous Pd(Co) at room temperature is demonstrated, triggered by electrochemical hydrogen sorption. Comprehensive magnetic...
In article number 1902393, Charles G. Knutson, Roger D. Kamm, and co‐workers use microvascular networks self‐assembled from human cells within microfluid devices to directly measure trans‐capillary solute flux. Physiological fluid flow through the cell junctions, passive diffusion across the cell membrane, and active vesicular transport, recapitulate the in vivo mode and magnitude of transport for...
All‐inorganic perovskite solar cells have developed rapidly in the last two years due to their excellent thermal and light stability. However, low efficiency and moisture instability limit their future commercial application. The mixed‐halide inorganic CsPbI2Br perovskite with a suitable bandgap offers a good balance between phase stability and light harvesting. However, high defect density and low...
Herein, the previously unrealized ability to grow nanorods and nanotubes of 2D materials using femtosecond laser irradiation is demonstrated. In as short as 20 min, nanorods of tungsten disulfide, molybdenum disulfide, graphene, and boron nitride are grown in solutions. The technique fragments nanoparticles of the 2D materials from bulk flakes and leverages molecular scale alignment by nonresonant...
For years, luminescence lifetime imaging has served as a quantitative tool in indicating intracellular components and activities. However, very few studies involve the in vivo study of animals, especially in vivo stimuli‐responsive activities of animals, as both excitation and emission wavelengths should fall into the near‐infrared (NIR) optical transparent window (660–950 and 1000–1500 nm). Herein,...
In article number 1904043, Haohong Duan, Yun Kuang, Xiaoming Sun, and co‐workers use ruthenium, a much cheaper noble metal (the price is about 1/3 of Pt metal) with Pt like adsorption energy to H, to synthesize amorphous RuSx nanoparticles with atomically isolated active sites adhered on the surface of sulfur‐doped graphene for hydrogen evolution, affording Pt‐like or even higher activity in the entire...
NiFe‐based materials have shown impressive electrocatalytic activity for the oxygen evolution reaction (OER). The mutual effect between proximate Ni and Fe atoms is essential in regulating the electronic structure of the active site to boost the OER kinetics. Detailed studies confirm that the separated monometal phases in NiFe‐based materials are detrimental to OER. Thus, the high‐level blending of...
In article number 1903379, Ahmed Mourran and co‐workers fabricate a spiral‐shaped microgel rotor that operates in the low Reynolds number regime. Light induces non‐equilibrium actuation of the hydrogel ribbon, which provides the necessary non‐reciprocal deformations to drive the rotor. The rotational motion is tunable by the modulation of the light.
Human mesenchymal stem cells (hMSCs), due to their immune regulation and collateral secretion effects, are currently explored for potential therapy of idiopathic pulmonary fibrosis (IPF). Understanding the migration, homing, functions, and survival of transplanted hMSCs in vivo is critical to successful IPF treatment. Therefore, it is highly desired to develop noninvasive and effective imaging technologies...
Solid polymer electrolytes (SPEs)‐based all‐solid‐state lithium–sulfur batteries (ASSLSBs) have attracted extensive research attention due to their high energy density and safe operation, which provide potential solutions to the increasing need for harnessing higher energy densities. There is little progress made, however, in the development of ASSLSBs to improve simultaneously energy density and...
Transition metal oxides have recently received great attention for application in advanced lithium‐ion batteries (LIBs) and oxygen evolution reaction (OER). Herein, the ethylenediaminetetraacetic cobalt complex as a precursor to synthesize ultrafine Co3O4 nanoparticles encapsulated into a nitrogen‐doped carbon matrix (NC) composites is presented. The as‐prepared Co3O4/NC‐350 obtained by pyrolysis...
An efficient and low‐cost electrocatalyst for reversible oxygen electrocatalysis is crucial for improving the performance of rechargeable metal−air batteries. Herein, a novel oxygen vacancy–rich 2D porous In‐doped CoO/CoP heterostructure (In‐CoO/CoP FNS) is designed and developed by a facile free radicals–induced strategy as an effective bifunctional electrocatalyst for rechargeable Zn–air batteries...
Currently, designing solid catalysts at high temperature is the main strategy to realize single‐walled carbon nanotubes (SWNTs) with specific chirality, meaning it is very hard and challenging to create new catalysts or faces to fit new chirality. However, low temperatures make most catalysts solid, and developing solid catalysts at low temperature is desired to realize chirality control of SWNTs...
Controllable and efficient synthesis of noble metal/transition‐metal oxide (TMO) composites with tailored nanostructures and precise components is essential for their application. Herein, a general mercaptosilane‐assisted one‐pot coassembly approach is developed to synthesize ordered mesoporous TMOs with agglomerated‐free noble metal nanoparticles, including Au/WO3, Au/TiO2, Au/NbOx, and Pt/WO3. 3‐mercaptopropyl...
Near‐infrared‐light‐mediated optical tweezing of individual upconverting particles has enabled all‐optical single‐cell studies, such as intracellular thermal sensing and minimally invasive cytoplasm investigations. Furthermore, the intrinsic optical birefringence of upconverting particles renders them light‐driven luminescent spinners with a yet unexplored potential in biomedicine. In this work, the...
Although graphite materials have been applied as commercial anodes in lithium‐ion batteries (LIBs), there still remain abundant spaces in the development of carbon‐based anode materials for sodium‐ion batteries (SIBs). Herein, an electrospinning route is reported to fabricate nitrogen‐doped carbon nanofibers with interweaved nanochannels (NCNFs‐IWNC) that contain robust interconnected 1D porous channels,...
2D layers of metal dichalcogenides are of considerable interest for high‐performance electronic devices for their unique electronic properties and atomically thin geometry. 2D SnS2 nanosheets with a bandgap of ≈2.6 eV have been attracting intensive attention as one potential candidate for modern electrocatalysis, electronic, and/or optoelectronic fields. However, the controllable growth of large‐size...
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