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。
Silver sulfide nanocrystals have been formed by the conversion of silver thiolate polymers with sodium sulfide in a dual-phase solution preparation. From transmission electron microscopy and laser desorption ionization mass spectrometry, the mean nanocrystalline diameter is estimated to be 5.4 nm. Large-angle X-ray di…
Two new one-dimensional (1-D) 3d-5d cyano-bridged bimetallic assemblies, ([Co(3)(II)(DMF)(12)][W(V)(CN)(8)](2)])(infinity) (1) and ([Mn(3)(II)(bipy)(2)(DMF)(8)][W(V)(CN)(8)](2))(infinity) (2), have been synthesized and characterized, where bipy stands for 2,2'-bipyridine and DMF represents N,N-dimethylformamide. The X…
We report on the synthesis of bimodal, structured silicas by a fully chemical, templating−scaffolding route that enables independent control over small and large mesopore sizes. Mesoporous MCM-41 nanoparticles, synthesized in a first step, are cross-linked in a second step, leading to a bimodal porous material. Triblo…
A nanowire−nanocable−nanotube scheme was designed for fabricating tubular ZnO in a microwave plasma system. Depending on optimal reaction conditions, diameters (from submicrometer to nanometer) and wall thicknesses of the tubular ZnOs can be controlled in the process. Data from morphology analyses, X-ray diffraction,…
The anodic oxidation of o -phenylenediamine at a platinum electrode in aqueous buffers at different pH (1−7), where growth of very thin (few nanometers thickness) and self-sealing polymeric films occurs, was investigated by cyclic voltammetry (CV) combined with off-line electrospray ionization-ion trap mass spectromet…
Biocomposites were produced using a biodegradable material as matrix, and sisal fibers as reinforcement. The biodegradable material is a commercial product called MaterBi-Y, which is based on a cellulose derivatives and starch system. The characterization of these biocomposites was not done before and it is necessary…
We describe a method for determining the thermal and elastic properties of the noncrystalline phase of semicrystalline polymers (the “interphase”) by Monte Carlo simulations. The method is applied to an interphase composed of freely rotating polyethylene-like chains, studied previously by Balijepalli and Rutledge ( J.…
We report a new structure, mesoporous structured polyhedral drum and spherical cages and shells formed by textured self-assembly of ZnO nanocrystals, which are made by a novel self-assembly process during epitaxial surface oxidation. The cages/shells exhibit unique geometrical shapes, and their walls are composed of m…
Single-walled and multiple-walled carbon nanotubes were functionalized with poly(vinyl alcohol) (PVA) in esterification reactions. Similar to the parent PVA, the functionalized carbon nanotube samples are soluble in highly polar solvents such as DMSO and water. The common solubilities have allowed the intimate mixing…
<div class="htmlview paragraph">Armoured tracked vehicle is a complex weapon platform. It accommodates weapon system, gun control systems, fire control systems for accurate firing, high-density powerpack, Automatic transmission system, hydro pneumatic suspension for better mobility and crew comfort at different…
Abstract The mechanical, elastic and anharmonic properties of zinc blende MgS compound have been investigated using a three‐body force potential arising from the charge transfer effects due to the deformation of the electronic shell of overlapping ions. The agreement between the results for elastic constants and bulk…
Abstract The 18 O tracer experiments were carried out on two cubic YSZ single crystals at temperatures of T D = 423 K and T D = 473 K. The diffusion profiles were determined by the SIMS technique. The diffusion coefficients, the surface exchange coefficients and the activation enthalpy are discussed together with earl…
The absorption and resonance Raman (RR) spectra of the bis-N-methylimidazole, bis-1,5-dicyclohexylimidazole, and bis-pyridine complexes of the meso-alphaalphabetabeta and meso-alphabetaalphabeta atropisomers of Fe(II)-tetrakis(o-pivalamidophenyl)porphyrins (Fe(II)TpivPP) were obtained in methylene chloride. The differ…
We investigate whether block copolymers of controlled effective segregation strength can be designed via a novel controlled radical polymerization technique that allows statistical polymerization of different monomers in either one of the constituting blocks: We examine the morphologies and segregation regimes of two…
Photoluminescence was observed in both synthetic and natural forms of the transition metal dichalcogenide ${\mathrm{MoS}}_{2}.$ The emission is in the near infrared between 0.8 and 1.2 eV. Two distinct regions were identified. The first region, centered at 1.18 eV and observed only in the synthetic material, is produc…
[reaction: see text] The ene reaction of singlet oxygen with chiral trisubstituted alkenes bearing an alkyl and a phenyl group at the stereogenic center is erythro diastereoselective in solution and threo diastereoselective if carried out within zeolite Na-Y. The change of the diastereoselection trend by zeolite confi…
We compare the efficacies of three preparation methods intended to create in an easy and inexpensive way a nonpreferential surface for a two-component homopolymer blend of polystyrene and poly(methyl methacrylate). The first method is to physically absorb two different high molecular weight copolymers of styrene and m…
A photoinduced transition from a charge-density-wave (CDW) phase to a charge-polarization (CP) phase has been recently found in a one-dimensional halogen-bridged binuclear platinum complex ${\mathrm{R}}_{4}[{\mathrm{Pt}}_{2}(\mathrm{pop}{)}_{4}\mathrm{I}]n{\mathrm{H}}_{2}\mathrm{O}$ $[\mathrm{pop}={\mathrm{P}}_{2}{\ma…
The evolution of the magnetic and structural properties of ${\mathrm{La}}_{2/3}{\mathrm{Ba}}_{1/3}{\mathrm{MnO}}_{3}$ perovskite manganite was studied as a function of temperature by means of dc magnetic measurements at zero pressure as well as under uniaxial pressure of 0.1 kbar and neutron-diffraction between 5--370…
We have gained new insight into the interactions between the second-messenger protein calmodulin (CaM) and myosin light chain kinase from skeletal muscle (skMLCK) using small-angle solution scattering and shape restoration. Specifically, we explored the nature of a 2Ca(2+)-CaM-skMLCK complex and compared it to a 4Ca(2…