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Polyoxometalates (POMs) are widely used in catalysis, energy storage, biomedicine, and other research fields due to their unique acidity, photothermal, and redox features. However, the leaching and agglomeration problems of POMs greatly limit their practical applications. Confining POMs in a host material is an efficient tool to address the above‐mentioned issues. POM@host materials have received...
A high efficiency and great tunability of bandwidth and absorption‐range electromagnetic wave absorber is proposed without precedent. A series of 2D carbon‐based nanocomposites with the loading of cerium oxide (CN‐Ce) and other types of rare earth oxides (CN‐REOs) can be successfully synthesized by a simple solvothermal‐sintering method. As‐synthesized 2D nanocomposites with local graphite‐like C3...
Improving electro‐optic properties is essential for fabricating high‐quality liquid crystal displays. Herein, by doping amorphous Mn3O4 octahedral nanocages (a‐Mn3O4 ONCs) into a nematic liquid crystal (NLC) matrix E7, outstanding electro‐optic properties of the blend are successfully obtained. At a doping concentration of 0.03 wt%, the maximum decreases of threshold voltage (Vth) and saturation voltage...
Structural flexibility can be a desirable trait of an operating catalyst because it adapts itself to a given catalytic process for enhanced activity. Here, amorphous cobalt hydroxide nanocages are demonstrated to be a promising electrocatalyst with an overpotential of 0.28 V at 10 mA cm−2, far outperforming the crystalline counterparts and being in the top rank of the catalysts of their kind, under...
The development of fluorescence turn‐on probes for selectively sensing toxic gases and visualization identification of fingerprints is significantly important for society security and human health. Here, Zr is used as the metal center and 1,3,6,8‐tetra (4‐carboxylphenyl) pyrene (TBAPy) and tetrakis(4‐carboxyphenyl)porphyrin (TCPP) as double linkers to synthesize a novel Zr(TBAPy)5(TCPP) material....
Semiconductor‐based surface enhanced Raman scattering (SERS) has attracted great attention due to its excellent spectral reproducibility, high uniformity, and good anti‐interference ability. However, its relatively low SERS sensitivity still hinders its further developments in both performance and applications. Since the SERS is a peculiar surface effect, investigating the facet‐dependent SERS activity...
Using a homemade, novel, in situ transmission electron microscopy (TEM) double tilt tensile device, plastic behavior of single crystalline Cu nanowires of around 150 nm are studied. Deformation twins occur during the tests as predesigned before the experiments. In situ observation of twin boundary sliding (TBS) caused by full dislocation (extended dislocation) is first revealed at the atomic scale...
Nanoparticle‐assembled octahedral Ag nanocages with sharp edges have been successfully synthesized through a Cu2O‐based template‐assisted strategy. In the reaction system, Ag nanoparticles can be self‐assembled on the surface of Cu2O octahedrons, which is accomplished by the reduction of Ag+ by NaBH4 in the presence of sodium citrate as a capping agent. The hollow octahedral Ag nanocages are obtained...
A transition‐metal‐free asymmetric supercapacitor (ASC) is successfully fabricated based on an earth‐abundant biomass derived redox‐active biomolecule, named lawsone. Such an ASC exhibits comparable or even higher energy densities than most of the recently reported transition‐metal‐based ASCs, and this green ASC generation from renewable resources is promising for addressing current issues of electronic...
On page 4683, H. Wang L. Guo, and co‐workers present a novel transition‐metal‐free asymmetric supercapacitor (ACS) based on a biomolecule named lawsone (2‐hydroxy‐1,4‐naphthoquinone), which is a natural component derived from henna. The ASC shows comparable or even higher energy densities compared to those of reported transition‐metal‐based ASCs, and provides a new strategy for the generation of versatile...
In situ bending tests and dynamic modeling simulations are for the first time revealing the mechanical behavior of copper nanowires (NW) with radially grown fivefold twin structures on the atomic scale. Combining the simulations with the experimental results it is shown that both the twin boundaries (TBs) and the twin center act as dislocation sources. TB migration and L‐locks are readily observed...
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