Materials Literature
文献浏览
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。
Performance of Open-End and Ring Spun Yarns in Weft Knitted Fabrics
In this paper, the dimensional and some physical properties of a series of plain jersey and lacoste fabrics made from both cotton ring and open-end spun yams are investigated. The results show that structural differences in the yarn play a large part in determining the dimensions and behavior of these two fabric types…
Specific Heat Capacity of Semiconducting Glasses: Binary Vanadium Tellurite
The specific heat capacity Cp of the non-crystalline solid (100 — x)TeO2–(x)V2O5 glasses where x = 10, 25, 40 and 45 mol% has been measured in the temperature range 300 to 650 K. The difference of specific heat capacities, ΔCp of the glass (Cp glass) and supercooled liquid (Cp liquid) at Tg was also measured for the w…
Design and performance of a versatile, cost-effective microwave electron cyclotron resonance plasma source for surface and thin film processing
A plasma source has been developed, which makes use of electron cyclotron microwave resonance conditions without cost-intensive tuning or other active elements. A magnetron typical of domestic microwave ovens is coupled to a cylindrical resonator of fixed dimensions. A high density plasma is maintained with permanent…
Piezoelectric and pyroelectric properties of protein amino acids as basic materials of Soft State Physics
There are claims in the scientific literature that many biological materials are ferroelectrics, and that ferroelectricity, along with piezo-and pyroelectricity, are a fundamental property of biological materials. The best way to tackle this general problem is to start from the very beginning, namely from protein amin…
Determining point charge arrays that produce accurate ionic crystal fields for atomic cluster calculations
In performing atomic cluster calculations of local electronic structure defects in ionic crystals, the crystal is often modeled as a central cluster of 5–50 ions embedded in an array of point charges. For most crystals, however, a finite three-dimensional repeated array of unit cells generates electrostatic potentials…
Attenuation Measurements in Solutions of Some Carbohydrates
The linear attenuation coefficients in aqueous solutions of three carbohydrates, glucose (C6H12O6), maltose monohydrate (C12H22O11·H2O), and sucrose (C12H22O11), were determined at 81, 356, 511, 662, 1173, and 1332 keV by the gamma-ray transmission method in a good geometry setup. From the precisely measured densities…
Comparative study of the coprecipitation methods for the preparation of Layered Double Hydroxides
Coprecipitation is the method most frequently applied to prepare Layered Double Hydroxides (LDHs). Two variations of this method can be used, depending on the pH control conditions during the precipitation step. In one case the pH values are allowed to vary while in the other they are kept constant throughout coprecip…
How corrosion affects industry and life
Corrosion management principles, along with conventional technical solutions to corrosion problems in industry, can be utilized to mitigate corrosion and its resulting problems.
Crystal Structure and Replacement Reaction of Coordinated Water Molecules of the Heteropoly Compounds of Sandwich-Type Tungstoarsenates
Six new heteropoly compounds in the [M4(H2O)2(As2W15O56)2]16- series (M = CuII, MnII, CoII, NiII, ZnII, CdII), previously unknown, were synthesized and characterized by means of IR, UV-vis, CV, 183W NMR, TG-DSC, and elemental analyses. The synthetic method used in preparing this type of heteropoly compounds was differ…
Charge and orbital ordering in underdopedLa1−xSrxMnO3
We have explored spin, charge, and orbitally ordered states in ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{MnO}}_{3}$ $(0<x<1/2)$ using model Hartree-Fock calculations on $d\ensuremath{-}p$-type lattice models. At $x=1/8,$ several charge and orbitally modulated states are found to be stable and al…
On the nature of thermal diffusion in binary Lennard-Jones liquids
The aim of this study is to understand deeper the thermal diffusion transport process (Ludwig–Soret effect) at the microscopic level. For that purpose, the recently developed reverse nonequilibrium molecular dynamics method was used to calculate Soret coefficients of various systems in a systematic fashion. We studied…
Giant1/fnoise in perovskite manganites: Evidence of the percolation threshold
We discovered an unprecedented magnitude of the $1/f$ noise near the Curie temperature ${(T}_{c})$ in low-${T}_{c}$ manganites. The scaling behavior of the $1/f$ noise and resistance provides strong evidence of the percolation nature of the ferromagnetic transition in the polycrystalline samples. The steplike changes…
Electronic structure ofCu1−xNixRh2S4andCuRh2Se4: Band-structure calculations, x-ray photoemission, and fluorescence measurements
The electronic structure of spinel-type ${\mathrm{Cu}}_{1\ensuremath{-}x}{\mathrm{Ni}}_{x}{\mathrm{Rh}}_{2}{\mathrm{S}}_{4}$ $(x=0.0,$ 0.1, 0.3, 0.5, 1.0) and ${\mathrm{CuRh}}_{2}{\mathrm{Se}}_{4}$ compounds has been studied by means of x-ray photoelectron (XPS) and fluorescent spectroscopy. Cu ${L}_{3},$ Ni ${L}_{3},…
Multiscale Finite-Difference-Diffusion-Monte-Carlo Method for Simulating Dendritic Solidification
We present a novel hybrid computational method to simulate accurately dendritic solidification in the low undercooling limit where the dendrite tip radius is one or more orders of magnitude smaller than the characteristic spatial scale of variation of the surrounding thermal or solutal diffusion field. The first key f…
Compaction of Rods: Relaxation and Ordering in Vibrated, Anisotropic Granular Material
We report on experiments to measure the temporal and spatial evolution of packing arrangements of anisotropic, cylindrical granular material, using high-resolution capacitive monitoring. In these experiments, the particle configurations start from an initially disordered, low-packing-fraction state and under vertical…
Trapping Light in Polymer Photodiodes with Soft Embossed Gratings
Increasing the conversion efficiency is very important in photovoltaic devices, as is cheap and simple technology. Here is demonstrated a soft embossing technique for printing a submicrometer grating with an elastomeric mold into an optically active polymer layer in a photovoltaic device (see Figure). The light trappi…
Asymmetric block copolymers confined in a thin film
We have used a dynamic density functional theory (DDFT) for polymeric systems, to simulate the formation of micro phases in a melt of an asymmetric block copolymer, AnBm(fA=1/3), both in the bulk and in a thin film. In the DDFT model a polymer is represented as a chain of springs and beads. A spring mimics the stretch…
New developments of computer-aided crystallographic analysis in transmission electron microscopy
A new computer program for on-line crystallographic analysis in transmission electron microscopy (TEM) is presented. The program is based on the fast on-line determination of single-crystal orientations from Kikuchi and spot patterns. Spot patterns, which are particularly useful in the case of highly deformed metals,…
Infrared Study of Water Sorption on Na-, Li-, Ca-, and Mg-Exchanged (SWy-1 and SAz-1) Montmorillonite
Abstract An environmental infrared microbalance (EIRM) cell was used to study H 2 O sorption on two montmorillonite samples as a function of water content and type of exchangeable cation. The vibrational spectra showed that H 2 O sorbed to the clay at low-water content was strongly influenced by the exchangeable catio…