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The development of cost‐effective catalysts to replace noble metal is attracting increasing interests in many fields of catalysis and energy, and intensive efforts are focused on the integration of transition‐metal sites in carbon as noble‐metal‐free candidates. Recently, the discovery of single‐atom dispersed catalyst (SAC) provides a new frontier in heterogeneous catalysis. However, the electrocatalytic...
A straightforward method to generate both atomic‐scale sharp and atomic‐scale planar electrodes is reported. The atomic‐scale sharp electrodes are generated by precisely stretching a suspended nanowire, while the atomic‐scale planar electrodes are obtained via mechanically controllable interelectrodes compression followed by a thermal‐driven atom migration process. Notably, the gap size between the...
Recombination of photogenerated electron–hole pairs is extremely limited in the practical application of photocatalysis toward solving the energy crisis and environmental pollution. A rational design of the cascade system (i.e., rGO/Bi2WO6/Au, and ternary composites) with highly efficient charge carrier separation is successfully constructed. As expected, the integrated system (rGO/Bi2WO6/Au) shows...
Piezoresistive sensor is a promising pressure sensor due to its attractive advantages including uncomplicated signal collection, simple manufacture, economical and practical characteristics. Here, a flexible and highly sensitive pressure sensor based on wrinkled graphene film (WGF)/innerconnected polyvinyl alcohol (PVA) nanowires/interdigital electrodes is fabricated. Due to the synergistic effect...
In recent years, 2D materials are attracting increased attention because of their excellent properties. In this paper, new 2D carbon nitride (CN) organic materials are successfully prepared on the basis of the organic synthesis theory, and the thickness is about 1.5 nm. This new 2D CN organic material further strengthens the 2D materials family. Meanwhile, their synthetic mechanism is theoretically...
Heterostructures have attracted increasing attention due to their amazing synergetic effects, which may improve the electrochemical properties, such as good electrical/ionic conductivity, electrochemical activity, and mechanical stability. Herein, novel hierarchical Fe2O3@Ni3Se4 nanotubes are successfully fabricated by a multistep strategy. The nanotubes show length sizes of ≈250–500 nm, diameter...
Cathode buffer layers (CBLs) can effectively further the efficiency of polymer solar cells (PSCs), after optimization of the active layer. Hidden between the active layer and cathode of the inverted PSC device configuration is the critical yet often unattended vertical diffusion of the active layer components across CBL. Here, a novel methodology of contrast variation with neutron and anomalous X‐ray...
In article number 1703963, Alejandro G. Roca, Josep Nogués, and co‐workers report the magnetic structure and properties of zinc blende and wurtzite CoO nanoparticles. Both phases are antiferromagnetic, although the wurtzite‐CoO presents a complex structure with a second type order along the c‐axis, but an incommensurate order along the y‐axis. In addition, the overall magnetic properties are overwhelmed...
Hydrogen is an ideal synthetic fuel because it is lightweight, abundant and its oxidation product (water) is environmentally benign. However, its utilization is impeded by the lack of an efficient storage device. A new building block approach is proposed for an exhaustive search of optimal hydrogen uptakes in a series of low density boron nitride (BN) nanoarchitectures via extensive 3868 ab initio‐based...
Light‐weight graphite foam decorated with carbon nanotubes (dia. 20–50 nm) is utilized as an effective electrode without binders, conductive additives, or metallic current collectors for supercapacitors in aqueous electrolyte. Facile nitric acid treatment renders wide operating potentials, high specific capacitances and energy densities, and long lifespan over 10 000 cycles manifested as 164.5 and...
This paper presents a new method of sensing single molecules and cations by a carbon nanotube (CNT)‐based differential resistive pulse sensing (RPS) technique on a nanofluidic chip. A mathematical model for multichannel RPS systems is developed to evaluate the CNT‐based RPS signals. Individual cations, rhodamine B dye molecules, and ssDNAs are detected successfully with high resolution and high signal‐to‐noise...
The oxygen reduction reaction (ORR) plays an important role in the fields of energy storage and conversion technologies, including metal–air batteries and fuel cells. The development of nonprecious metal electrocatalysts with both high ORR activity and durability to replace the currently used costly Pt‐based catalyst is critical and still a major challenge. Herein, a facile and scalable method is...
Supramolecular chiral nanotubes that have a dense layer of short poly(ethylene glycol) (PEG) chains on their inner surfaces are able to not only extract peptides from bulk solution, but also back‐extract them by means of thermal dehydration and rehydration of the PEG chains. In article number 1800030, Naohiro Kameta and co‐workers show that the peptides, including D‐amino acids (green‐colored Ala...
In article number 1703815, Zongliang Li, Takhee Lee, Dong Xiang, and co‐workers fabricate both atomic‐scale sharp and atomic‐scale planar electrodes by pure mechanical operation, and the gap size between electrodes can be controlled with sub‐angstrom accuracy. With these two achievements, the electron transport as well as Raman scattering in the molecular junctions are well modulated.
The luminescent properties and morphology of as‐prepared perovskite films can be improved significantly by post‐moisture treatment. In article number 1703410, Xuyong Yang and co‐workers show that the morphology of perovskite films becomes much smoother and the light emission is also greatly enhanced after post‐moisture treatment. This is very beneficial for fabricating high‐performance light‐emitting...
Contact lens is a ubiquitous technology used for vision correction and cosmetics. Sensing in contact lenses has emerged as a potential platform for minimally invasive point‐of‐care diagnostics. Here, a microlithography method is developed to fabricate microconcavities and microchannels in a hydrogel‐based contact lens via a combination of laser patterning and embedded templating. Optical microlithography...
Surface nanotexturing with excellent light‐trapping property is expected to significantly increase the conversion efficiency of solar cells. However, limited by the serious surface recombination arising from the greatly enlarged surface area, the silicon (Si) nanotexturing‐based solar cells cannot yet achieve satisfactory high efficiency, which is more prominent in organic/Si hybrid solar cells (HSCs)...
Monolayer of 2D transition metal dichalcogenides, with a thickness of less than 1 nm, paves a feasible path to the development of ultrathin memristive synapses, to fulfill the requirements for constructing large‐scale high density 3D stacking neuromorphic chips. Herein, memristive devices based on monolayer n‐MoS2 on p‐Si substrate with a large self‐rectification ratio, exhibiting photonic potentiation...
A series of nanotubes with a dense layer of short poly(ethylene glycol) (PEG) chains on the inner surface are prepared by means of a coassembly process using glycolipids and PEG derivatives. Dehydration of the PEG chains by heating increases the hydrophobicity of the nanotube channel and fluorescent‐dye‐labeled amino acids are extracted from bulk solution. Rehydration of the PEG chains by cooling...
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