Materials Literature
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Abstract Scattering of a TM plane wave from a finite periodic surface is studied by the spectral formalism. First, the diffraction beam, the optical theorem, the total scattering cross section and the relative power of diffraction beam are defined. By use of the principle of reflection, it is shown that the spectrum o…
Abstract Sulfonic acid esters of differently linked polysaccharides including cellulose, dextran, lichenan, and pullulan were synthesized homogeneously applying N,N ‐dimethylacetamide/LiCl as the solvent. The dependence of the degree of substitution (DS) on the molar ratio of repeating unit to sulfonic acid chloride a…
Polymer self-consistent field theory of the Edwards-Helfand kind is the state-of-the-art method for predicting the morphologies of block copolymer materials. The methodology of block copolymer self-consistent field theory is transported to classical density functional theory such that a wide range of self-consistent f…
Hollow cadmium selenide (CdSe) tetrapods were synthesized on a large scale. The directional growth of twins led the tetrapod nanostructure to be formed. The silicon powder was responsible for the growth of the hollow tetrapods. The UV-visible absorption spectra of the hollow CdSe tetrapods display an absorption edge a…
This article presents a method of characterizing the macromechanical properties of polymer nanofibrous scaffolds based on the nanomechanical properties obtained for a single nanofiber. Here, we use the example of a poly(L-lactic acid) (PLLA) nanofibrous scaffold that can be used for tissue engineering application. The…
Abstract The blend miscibility of poly(vinyl alcohol) and poly(methyl methacrylate) in N,N ′‐dimethylformamide solution was investigated by viscosity, density, ultrasonic velocity, refractive index, and UV and fluorescence spectra studies. Differential scanning calorimetry and scanning electron microscopy were used to…
Abstract A combination of microscopy studies (SEM, ESEM/EDX, and TEM/EDX) is proven to be useful in locating chalk particles and silicone elastomer in a flame retardant system based on ethylene–acrylate copolymer, chalk, and silicone elastomer. The dispersion of the two additives was also obtained. The chalk particles…
Abstract The crystallization behaviors of poly( p ‐dioxanone) (PPDO) with different molecular weights (MWs) have been studied using a differential scanning calorimetry. The results showed that the MW of PPDO affects the crystallization rate and crystallinity obviously during the dynamic crystallization process. The Av…
We present dc magnetization experiments performed on the doped, polycrystalline system ${\mathrm{La}}_{0.67\ensuremath{-}x}{A}_{x}{\mathrm{Ca}}_{0.33}\mathrm{Mn}{\mathrm{O}}_{3}$ $(A=\mathrm{Ce},\mathrm{Y})$. The ceramic samples have been obtained by the nitrate decomposition route and structurally characterized by po…
The Bi1.5ZnNb1.5O7 (BZN) thin films with cubic pyrochlore structure were prepared on Pt∕SiO2∕Si substrates by pulsed laser deposition from a stoichiometric target. The crystallinity, surface morphology, and dielectric properties of BZN thin films at different substrate temperatures were investigated. It was found that…
We study the structure and magnetism of the ferromagnetic half metallic Heusler compound Co 2 MnGe in high-quality [Co 2 MnGe/Au] n - and [Co 2 MnGe/V] n -multilayers by hard x-ray scattering and soft x-ray resonant magnetic scattering. The diffuse hard x-ray scattering reveals that in [Co 2 MnGe/Au] n at the interfac…
Abstract This study described the synthesis of hydrochloric acid (HCl)‐doped poly ( N ‐methylaniline) (PNMA) with carboxylic groups containing multi‐walled carbon nanotubes (c‐MWNTs) via in situ polymerization. Based on the π–π electron interaction between c‐MWNTs and the N ‐methylaniline monomer and the hydrogen bond…
The interaction of the graphite strike plate material in ITER, with a divertor plasma containing beryllium, is simulated experimentally in PISCES-B. Graphite targets are exposed at 600 K to deuterium plasmas with fixed beryllium fractions ( ) in the range 0.0003 ⩽ f Be ⩽ 0.011. From the onset of beryllium injection, t…
Silicon nanorods 20nm in diameter are fabricated by reactive ion etch (RIE) to study anisotropy and damage profile in decananometer scale. RIE of gas mixture of SF6∕O2 and SF6∕CHF3 is tuned to achieve high anisotropy. The gas specie of SF6∕O2 can reach 90% anisotropy, 84° taper angle, and 10:1 selectivity when SiO2 is…
Abstract A new type of polyimide/silica (PI/SiO 2 ) hybrid composite films was prepared by blending polymer‐modified colloidal silica with the semiflexible polyimide. Polyimide was solution‐imidized at higher temperature than the glass transition temperature ( T g ) using 3,3′,4,4′‐biphenyltetracarboxylic dianhydride…
The effective pair potentials between different kinds of dendrimers in solution can be well approximated by appropriate Gaussian functions. We find that in binary dendrimer mixtures the range and strength of the effective interactions depend strongly upon the specific dendrimer architecture. We consider two different…
In this article, based on electronic structure calculations, the conditions are discussed under which a genuine half-metallic interface between a heusler C1 b half-metal and a semiconductor can exist. An explanation is given why for the III–V semiconductors the double anion terminated (111) interface is the only possi…
The nonlinear rheology of styrene-butadiene rubber filled with carbon-black or silica particles is investigated by complementary viscosimetric devices on a wide range of deformation and deformation rates. The effect of filler volume fraction on the rheological behavior is systematically studied. The importance of a cr…
Two oxo-bis(benzene-1,2-dithiolato)chromate(V) complexes, namely, [CrO(L(Bu))2]1- and [CrO(L(Me))2]1-, have been synthesized and studied by UV-vis, EPR, magnetic circular dichroism (MCD), and X-ray absorption spectroscopy and by X-ray crystallography; their electro- and magnetochemistries are reported. H2L(Bu) represe…
Abstract To understand the effect of extension of molecular chain in amorphous region in polymer fibers to thermal conductivity, the thermal conductivity, tensile modulus and crystal orientation angle of ramie fibers and those drawn by the stress of 17.4 kg/mm 2 (water treatment) in the water were investigated. The te…