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。
This study presents a rapid continuous process for grain refinement in metallic materials through severe plastic deformation (SPD). The principle is described and the process is applied to an Al-5056 alloy and an S45C carbon steel. The new process, designated in this study the severe torsion straining process (STSP),…
Di-(2-ethyl hexyl) phthalate (DEHP), a conventional plasticizer in polyvinyl chloride (PVC), was partially replaced by polymeric plasticizers. Three different elastomers such as nitrile rubber (NBR), carboxylated nitrile rubber (XNBR) and epoxidized natural rubber (ENR) were used as polymeric plasticizers. Mechanical…
Vanadium dioxide films were deposited on glass from the APCVD reaction of VOCl3 and water at 650 °C. Introduction of a second precursor TiCl4 affected the growth morphology of the VO2 films but did not incorporate any detectable titanium. The films were characterised by XPS, XRD, Raman, EDAX and SEM. Interestingly the…
Linear arranged polypyrrole microcontainers have been assembled into one or two lines on patterned silicon micro-electrodes with line widths of 50 and 200 microm, respectively.
The aim of this study was to analyse the transfer of steam through different types of textile layers as a function of sample parameters such as thickness and permeability. In order to simulate the human body, a cylinder releasing defined amounts of moisture was also used. The influence of sweating on heat and mass tra…
This paper addresses the critical issue of scaling limits of local interconnects, contact plugs and local vias made of metal. It is shown that the current carrying capacity of copper vias/contacts fails to meet ITRS current density requirements beyond the 45 nm technology node. Additionally, the electrical properties…
Titanium tracer diffusivities were determined in donor doped SrTiO3 at temperatures between 1573 and 1673 K in synthetic air. La-doped SrTiO3 single crystals cut in the three crystal orientations (100), (110), and (111), were used. After annealing, the well known formation of SrO islands is observed. Their number and…
Bulk quantities of single-crystal Te microtubes have been synthesized by a simple physical evaporation method. Scanning electron microscopy (SEM) revealed the hollow prismatic morphology of the microtubes, which had diameters ranging from about 10 to several hundred micrometers and length up to several centimeters. X-…
Abstract In this article, the search for the elusive biaxial nematic phase (N B ) in liquid crystals is considered. The structure of the phase is described along with theoretical and computational work which suggests how it might be realised. An overview of the work of the Exeter group in this area is then given showi…
A novel V-shaped polyoxotungstate is formed when Ce(IV) metal centres bridge monolacunary [PW(11)O(39)](7-) anions to an unusual 1,4-bilacunary [PW(10)O(38)](11-) anion which appears with an unprecedented bridging structural motif.
The II-VI semiconductors are important optoelectronic, luminescent, and lasing materials. This paper presents a review on synthesis, structure, and growth mechanisms of one-dimensional nanostructures of ZnS, CdSe, ZnSe, CdS and CdO. The two most frequently received wurtzite structures of these materials are "nanobelts…
The influence of electrodeposited polypyrrole (Ppy) films on the corrosion behavior of aluminum and Al 2024-T3 alloy, particularly on the corrosion behavior of exposed metal in damaged areas of the film, has been investigated using the scanning vibrating electrode technique (SVET). Two types of experiments are describ…
We demonstrate that the particle mediated interaction between a pendant water drop, covered by a latex particle monolayer, and a planar decane/water interface leads to bridging, analogous to flocculation in solid-stabilised emulsions. The results also provide information about the particle contact angle at the oil/wat…
The benefits of carrying out single crystal X-ray diffraction (SXRD) experiments at low temperatures have long been recognised by the scientific community, as clearly demonstrated by the massive increase in publications reporting the use of low temperature SXRD in the past 15 years. This tutorial review will summarise…
Structural moieties including core units (such as phenyl, naphthyl and thiophenyl), linking groups (such as ethynyl), terminal substituents (such as cyano, isothiocyanato and fluoro), and lateral fluoro substituents have been incorporated into novel materials designed to confer a high birefringence on nematic mixtures…
Nickel oxide thin films, known as optically active counter electrodes in electrochromic devices, were grown at room temperature under an oxygen pressure of 10 − 1 mbar, using pulsed laser deposition (PLD). The influence of the film thickness, potential window, and extended cycling on the electrochromic properties was…
Cationic and anionic clusters 195Ptn±, 1 ≤ n ≤ 24, were generated by laser vaporization using an isotopically enriched platinum sample. The oxidation of the clusters by nitrous oxide under binary collision conditions was investigated as a function of charge and size in a Fourier transform ion cyclotron resonance mass…
The propagation speed of the front of electrochemical conversion, from semiconductor to highly doped polymer, in films of regioregular poly(3-hexylthiophene) spin cast on insulating substrates was analyzed. Propagation of the p-doped zone in polymer electrochromic devices was imaged simultaneously with recording of el…
An organic solvent-type electrolytic solution was employed for application on an electric double-layer capacitor (EDLC) made of a polyvinylidene chloride (PVDC) based carbon material. Although the PVDC-based carbon material showed an excellent capacitance over a 100 F/g in an aqueous solvent-type electrolytic solution…
A highly selective titania supported propylene epoxidation catalyst was synthesized from chemically reduced, thiol capped, gold nanoparticles, and characterized by TEM and XPS.