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。
We summarize a few proposals for mixing F center states through the mediation of an appropriate symmetry-breaking vibrational mode. Electron-mode coupling energies odd-order in the mode coordinates are characteristic of the pseudo-Jahn-Teller mixing of nearly-degenerate opposite-parity electronic states mediated by an…
At what characteristic length scale does classical continuum elasticity cease to accurately describe small deformation mechanical behavior? The two dominant physical mechanisms that lead to size dependency of elastic behavior at the nanoscale are surface energy effects and nonlocal interactions. The latter arises due…
Self-assembled nanoporous tungsten oxide (WO3) with preferential orientation (002) planes was successfully synthesized on the tungsten sheet by anodization in a 0.2 wt % NaF and 0.3% (V/V) HF mixture solution in a 1:1 ratio. The pores, of a highly ordered self-assembled structure, had an average size of approximately…
Electrically conducting polymers such as polypyrrole (PPy) are important biomaterials in neural engineering applications, including neural probes, nerve conduits, and scaffolds for tissue and nerve regeneration. Surface modification of these polymers can introduce other valuable characteristics for neural interfacing…
We describe recent developments with multifunctional nanoengineered polymer capsules. In addition to their obvious use as a delivery system, multifunctional nanocontainers find wide application in enzymatic catalysis, controlled release, and directed drug delivery in medicine. The multifunctionality is provided by the…
Nanoparticles and in particular gold nanorods have interesting optical properties arising from two well-differentiated plasmon modes. The frequency of such modes can be altered by their chemical environment and coupling with neighboring rods. This study investigates new composite materials made of gold nanorods adsorb…
Cancer treatment efficacy and safety of the environmentally sensitive polymeric micelle drug carriers were significantly increased by optimizing the number of ligands on their surface. These micelles were designed to target the cancerous tumors through the interaction between folate and its receptors that overexpress…
Shrink when heated: A new model for flexible frameworks is used to simulate the structures and adsorption properties of isoreticular metal–organic frameworks (IRMOFs), such as IRMOF-1 (see picture; Zn silver, C cyan, H white, O red). The structural simulations suggest that the IRMOFs have negative thermalexpansion coe…
We show that the dynamics of kinetically constrained models of glass formers takes place at a first-order coexistence line between active and inactive dynamical phases. We prove this by computing the large-deviation functions of suitable space-time observables, such as the number of configuration changes in a trajecto…
Abstract The rheological behavior and the dynamic mechanical properties of syndiotactic 1,2‐polybutadiene (sPB) were investigated by a rotational rheometer (MCR‐300) and a dynamic mechanical analyzer (DMA‐242C). Rheological behavior of sPB‐830, a sPB with crystalline degree of 20.1% and syndiotactic content of 65.1%,…
Abstract The results of investigations low frequency dielectric relaxation in layered ferroelectric TlInS 2 crystals are presented. The measurements were performed in the temperature range of 180‐230 K and in the frequency range of 5 kHz–1 MHz. Two different relaxation processes were observed in mentioned temperature…
Abstract 〈110〉, 〈010〉 and 〈100〉 oriented uniaxial benzophenone crystals were grown by uniaxially solution‐crystallization method of Sankaranarayanan ‐ Ramasamy (SR). The experimental parameters involved in the present study were investigated in detail and a constant growth rate was achieved by compensating the loss of…
Abstract Studies on thermal and optical properties are very essential for a nonlinear optical material. Photoacoustics (PA) is a recently developed non‐destructive testing (NDT) tool for studying such properties. L‐Alaninium maleate (C 3 H 8 NO 2 + ·C 4 H 3 O 4 ‐ ), an organic non‐linear optical (NLO) material was syn…
For a series of six-coordinate RuII(CO)L or RhIII(X-)L porphyrins, which are facially differentiated by having a naphthoquinol- or hydroquinol-containing strap across one face, we show that ligand migration from one face to the other can occur under mild conditions and that ligand-site preference is dependent on the n…
Abstract Short glass fiber Type E was coated with electrically conducting polyaniline (PAn) by in situ chemical polymerization. The resulting PAn coated glass fiber, with surface conductivity of 3.3 × 10 −1 S/cm, was melt‐compounded with isotactic polypropylene (iPP). Polypropylene grafted with maleic anhydride was in…
O K and Ti L2,3 x-ray absorption near-edge spectra (XANES) of Pb1−xBaxZr0.65Ti0.35O3 (PBZT) ferroelectric ceramic compounds with x varying from 0.0 to 0.40 were obtained. The XANES spectra at the O K edge were compared with ab initio calculations based on the structures obtained by x-ray diffraction, using the FEFF 8.…
Abstract Modified hippuric acid (HA) single crystals have been grown from aqueous solution of acetone by doping with NaCl and KCl using slow evaporation technique at constant temperature, with the vision to improve the physicochemical properties of the sample. The characterisation of grown crystals was made by X‐ray p…
Abstract Single crystals of zinc magnesium tetra thiocyanate [ZnMg(SCN) 4 ], a bimetallic thiocyanate complex, were grown by slow evaporation solution growth technique at room temperature. The bright, transparent and colourless crystals have well defined faces. The grown crystals were characterized through elemental a…
We have studied electrical transport characteristics of individual double-wall carbon nanotubes (DWNT) under high bias voltages. As the bias voltage applied to the carbon nanotubes increases, the outermost shell of the DWNTs broke down sequentially, which enabled us to determine the current-carrying capacity of each s…
The temperature dependent local structure of $\mathrm{Tb}{\mathrm{Mn}}_{2}{\mathrm{O}}_{5}$ was determined by x-ray-absorption spectroscopy. An anomalous Tb-O distribution is found. At high temperature, it is broad but resolves into two distinct peaks below $\ensuremath{\sim}180\phantom{\rule{0.3em}{0ex}}\mathrm{K}$.…