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。
Alkylarenes were catalytically and selectively oxidized to the corresponding benzylic acetates and carbonyl products by nitrate salts in acetic acid in the presence of Keggin type molybdenum-based heteropolyacids, H(3+)(x)()PV(x)()Mo(12)(-)(x)()O(40) (x = 0-2). H(5)PV(2)Mo(10)O(40) was especially effective. For methyl…
We report on ZnO-based thin-film transistors (TFTs) fabricated using SiO2/p-Si substrates on which their ZnO channel layers have been deposited by rf sputtering at various temperatures: room temperature (RT), 100, and 200 °C. When they went through rapid thermal annealing in forming gas ambient (H2:N2=1:10) for n-type…
The VO2 multiphases such as V2O5, VO2, and V2O3 are confirmed and the correlations between structural characteristics and growth conditions was investigated using the scanning electron microscopy (SEM), transmission electron microscopy (TEM), x-ray diffraction (XRD), and x-ray photoelectron spectroscopy (XPS). Also, t…
The electric-field behavior at the triple junction of metal–dielectric–vacuum is theoretically investigated. For a two-dimensional junction in which the electric-field magnitude F behaves as rν−1, ν is obtained as a function of the configuration geometry and the dielectric constant. It is found that ν varies with the…
The compound Ti3SiC2 is a promising reinforcement for copper, but at a high volume content of Ti3SiC2, densification of Cu/Ti3SiC2 composites becomes difficult. To improve the densification behaviour and microstructure of Cu/Ti3SiC2 composites, Ti3SiC2 particulates were coated with a layer of copper by an electroless…
The aim of this research is to investigate the influence of a fluorochemical repellent treatment with and without an added durable press finish on the surface free energy changes of a cellulosic textile substrate as well as the durability of the finishing agents. For this purpose, contact angles are measured based on…
Covers advancements in spacecraft and tactical and strategic missile systems, including subsystem design and application, mission design and analysis, materials and structures, developments in space sciences, space processing and manufacturing, space operations, and applications of space technologies to other fields.
Wilson, W. E., Miller, J. H., Lynch, D. J., Lewis, R. R. and Batdorf, M. Analysis of Low-Energy Electron Track Structure in Liquid Water. Radiat. Res. 161, 591–596 (2004).An implementation is presented of interaction cross sections for non-relativistic electron track structure simulations. The model, incorporating liq…
Below 1 K, the specific heat C p of glasses depends approximately linearly on temperature T, in contrast with the cubic dependence observed in crystals, and which is well understood in terms of the Debye theory. That linear contribution has been ascribed to the existence of two-level systems as postulated by the tunne…
Using a finite-element method, we have calculated fluxmetric and magnetometric demagnetizing factors N/sub f/ and N/sub m/ for square cross-section bars as functions of susceptibility /spl chi/ and length-to-width ratio c/a over the range /spl chi/=-1 to /spl infin/ and c/a=0.01 to 100. We present the results in figur…
How Scale Inhibitors Work: Mechanisms of Selected Barium Sulphate Scale inhibitors Across a Wide Temperature Range K. S. Sorbie; K. S. Sorbie Heriot-Watt University, Edinburgh, Scotland Search for other works by this author on: This Site Google Scholar N. Laing N. Laing BP Exploration, Aberdeen, Scotland Search for ot…
Abstract The oxidative polymerization of aniline hydrochloride derivatives in water at low temperature is studied without lithium chloride. The resulting polymers have high molecular weight but the conductivity of the acid‐doped films is strongly dependent on the alkyl‐substituted chain at the 2‐positions. The root ca…
We have compared the quality of ZnO films grown on Si(111) substrates by two different methods: (1) initial Zn layer deposition followed by its oxidation and (2) thin MgO buffer layer deposition prior to the growth. All the layers are deposited by molecular beam epitaxy using a radio frequency radical cell. X-ray diff…
In the framework of schematic hard-spheres lattice models for granular media we investigate the phenomenon of the "jamming transition". In particular, using Edwards' approach, by analytical calculations at a mean-field level, we derive the system phase diagram and show that "jamming" corresponds to a phase transition…
Abstract The photo-excited structures of [Pt2(pop)4]4− and [Pt2(pop)2(popH)2]2−, (pop = diphosphite) in five kinds of complexes were analyzed by X-rays. For the complex with tetrabutylammonium (Bu), tetrapentylammonium (Pn), benzyltriethylammonium (Bzte), or benzyltributylammonium (Bztbu) as a counter cation, the Pt c…
Abstract A novel miniature mixer called the “Alberta Polymer Asymmetric Minimixer” (APAM) was designed, built and tested. In this study, polymer blends and nanofiber composites were compounded using a total of approximately 2 grams per sample. This mixer has a unique, asymmetric design consisting of a varying clearanc…
Single walled carbon nanotubes grown suspended between pillars of Si/SiO 2 structures are straightened by ion beam scans. In addition, the ion irradiation selectively removes nanotubes lying on the substrate, leaving the suspended nanotubes in place. This strategy provides a facile way to produce large area connected…
Ultrasonic atomic force microscopy (UAFM) was used to investigate the elasticity variation on domain boundary (DB) in lead zirconate titanate (PZT). The UAFM imaged the change in contact stiffness not only among grains but also on the DB. According to an analysis, the contact stiffness of the DB was approximately 10%…
An extensive program of shaking table tests on 1/4-scale three-dimensional R/C frames was jointly carried out by the Department of Structure, Soil Mechanics and Engineering Geology (DiSGG) of the University of Basilicata, Italy, and the National Laboratory of Civil Engineering (LNEC), Portugal. It was aimed at evaluat…
The liquid crystalline character of salts resulting from the interaction of poly(propylene imine) dendrimers with 3-cholesteryloxycarbonylpropanoic acid has been studied. The supramolecular structure and consequently the observed liquid crystalline phases are dictated by the degree of protonation of primary amino grou…