Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Physical properties of chalcogenide glass, including broadband infrared transparency, high refractive index, low glass transition temperature, and nonlinear properties, make them attractive candidates for advanced mid-infrared (3 to 12 μm) optical designs. Efforts focused at developing new chalcogenide glass formul…
Obtaining information about the intrinsic structure of polycrystalline materials is of prime importance owing to the anisotropic behaviour of individual crystallites. Grain orientation and its statistical distribution, i.e. the texture, have an important influence on the material properties. Crystallographic orientati…
The stress-invariance problem for a chiral (non-centrosymmetric) micropolar material model is explored in two different planar problems: the in-plane and the anti-plane problems. This material model grasps direct coupling between the Cauchy-type and Cosserat-type (or micropolar) effects in Hooke's law. An identical st…
Two new titania-based nanostructures—namely, hexagonally packed titania hoops (HTHs) and modified large compound vesicles (LCVs)—were created in polystyrene- b -poly(ethylene oxide) (PS- b -PEO)/titania microspheres by coupling self-assembly of the asymmetric amphiphilic block copolymers in selective solvents with the…
Crystallization is a commonly used purification process in industrial practice. It usually begins with heterogeneous nucleation on a foreign surface. The complicated mechanism of heterogeneous nucleation is not well understood, but we hypothesize that a possible correlation between binding affinity to a surface and nu…
Abstract Ultrafast demagnetization upon excitation with intense laser pulses has been observed for a variety of ferromagnetic materials. In half‐metals, long demagnetization times are expected due to the band gap for one spin direction. We have investigated the theoretically half‐metallic Heusler alloy Co 2 Cr 0.6 Fe…
We report both $^{77}\mathrm{Se}$ and $^{87}\mathrm{Rb}$ nuclear magnetic resonance (NMR) studies on Tl${}_{0.47}$Rb${}_{0.34}$Fe${}_{1.63}$Se${}_{2}$ single-crystalline superconductors (${T}_{c}\ensuremath{\approx}$ 32 K). Singlet superconductivity is suggested by a sharp drop of the Knight shift $K(T)$ below ${T}_{c…
A uniform Si-O coating on cotton fabric was produced at atmospheric pressure by a plasma treatment. Before the plasma discharge, a pretreatment with hexamethyldisiloxane (HMDSO)-ethanol mixture solvents on the fabric was employed. The surface morphology and chemical structure of the plasma-treated fibers were analyzed…
Abstract Heterogeneous catalysis and functional surfaces are intimately connected. Surface functionalities mediate the catalytic reactions. However, the surface must fulfil several requirements: adsorption of the reactants on the surface must be energetically favoured (but reversible), the surface functionalities must…
A layer-by-layer methodology was used for synthesizing CeO 2 /TiO 2 and TiO 2 /CeO 2 core–shell nanoparticles supported in Vycor glass pores. The layers were deposited by cerium- or titanium-based metalloorganic precursor decomposition. Sequential depositions promoted linear mass increases of the Vycor pieces and a li…
The magnetic susceptibilities, electrical resistivities, Hall coefficients, and Seebeck coefficients have been measured for single crystals of a narrow-gap semiconductor of FeSb 2 prepared using Sb metals of different purities. Below 40 K, carriers supplied from impurities of the Sb metal used as the raw material dete…
Like all spiders, tarantulas (family Theraphosidae) synthesize silk in specialized glands and extrude it from spinnerets on their abdomen. In one species of large tarantula, Aphonopelma seemanni, it has been suggested that silk can also be secreted from the tarsi but this claim was later refuted. We provide evidence o…
Abstract In this article, one cast technique to fabricate 20–40 wt %AgNO 3 ‐doped polyvinyl alcohol (PVA) composite films of which electrical resistance sharply dropped (4–5 order) in a certain temperature range was reported. The phase, structure thermal, and electrical resistivity properties of films at different hea…
TiO 2 nanoparticles were in situ generated in one-dimensional poly(methyl methacrylate) PMMA nanohybrid fibers with excellent dispersion by using electrospinning combined with a sol–gel method followed by a mild hydrothermal treatment that preserves the properties of the polymer to the maximum degree. Detailed informa…
Functional fluorescent semiconductor quantum dot (QD) based gels prepared via immobilizing QDs in organic matrices have shown promising properties, but the compatibility of QDs and organic matrix is not good, and the interactions of the ligands on the surface of QDs with organic matrix are weak, which lead to poor dis…
Abstract Polymer‐based porous hybrid materials (PHMs) carrying inorganic nanoparticles on the surface of pores have important applications in chemical and biological sensing, in chromatography, and in heterogeneous catalysis. This Feature Article provides an overview of the recent developments in the synthesis and fab…
Isotactic polypropylene (IPP) and calcium carbonate (CaCO3) nanocomposites were prepared by melt extrusion in a twinscrew extruder. The effect of CaCO3 nanoparticles on the crystallization and thermal conductivity (TC) of PP was studied by thermal analysis (DSC) and thermal conductivity analysis (TCA). The introductio…
We study electronic states of semi-infinite graphene with a corner edge, focusing on the stability of edge localized states at zero energy. The 60{\deg}, 90{\deg}, 120{\deg} and 150{\deg} corner edges are examined. The 60{\deg} and 120{\deg} corner edges consist of two zigzag edges, while 90{\deg} and 150{\deg} corner…
In this study, neodymia doped poly(vinyl) alcohol/zirconium–cerium acetate (PVA/Zr-Ce) nanofibers were prepared using the electrospinning technique, and then calcined at 800°C for 2 hours. For this purpose, PVA/Zr-Ce polymer solutions doped with different concentrations of neodymia were prepared using electrospinning…
Combined temperature-programmed desorption and IR studies suggest that absorption cross sections of IR-active vibrations of molecules "strongly" bound to single-wall carbon nanotubes (SWCNTs) are reduced at least by a factor of 10. Quantum chemical simulations show that IR intensities of endohedrally encapsulated mole…