Materials Literature
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The unique optical properties of gold nanorods, which exhibit tuneable absorption as a function of their aspect ratio, suggest that they might have potential applications in coatings for solar control on windows. Here we explore the properties of coatings produced by attaching gold nanorods to the surface of glass. Su…
The thermoluminescence (TL) studies of CaS : Bi nanocrystalline phosphors prepared by the wet chemical co-precipitation method and exposed to γ-rays have been discussed. The average grain size of the samples was estimated as 35 nm using Scherrer's equation. The samples exhibit a complex TL glow curve with multiple pea…
We examine the Breit-Wigner-Fano (BWF) line shape in the Raman spectra of carbon single-wall nanotubes (SWNTs) dispersed in aqueous suspensions. Bundling and electronic effects are studied by comparing undoped SWNTs (C-SWNTs) to boron-doped nanotubes (B-SWNTs) in a variety of different surfactant solutions. For SWNTs…
The origin of ferromagnetism in diluted magnetic semiconductors is still an open question, yielding a great deal of research across the world. This work focuses on the Co-Zn-O system. Room-temperature ferromagnetism is observed after a partial reaction of Co3O4 and ZnO, which can be ascribed neither to carrier mediati…
Surface defects on the substrate electrode have significant effects on electropolymerization processes. Influence of surface defects mechanically formed on a Pt electrode on electrochemical polymerization of aniline was investigated. Interestingly, it was found that existence of such surface defects leads to more favo…
Neste trabalho foi investigada a influência da concentração de uma mistura dos emulsificantes nonilfenol etoxilado e sulfato sódico de nonilfenol etoxilado (não iônico e iônico, respectivamente) e concentração de protetor coloidal, poli (álcool vinílico) na estabilidade coloidal de látices do copolímero acetato de vin…
A series of composite latex particles were prepared by two stage emulsion polymerization. Monodisperse acrylic particles, with an average particle size Dp z = 160 nm, were firstly synthesized. The second step consisted of styrene addition. Micrographs of the nanostructured particles were obtained by transmission elect…
Mg-x wt. %CuY (x = 15, 20, 25) composites were successfully prepared by reactive mechanical alloying (RMA). X-ray diffraction (XRD) measurement shows that main phases of the as milled composites are MgH2 and Mg2Cu, and they converted into Mg and MgCu2 after dehydrogenation, respectively. Pressure-Composition-Isotherm…
The professional modeling software package CrysVUn was employed to study the process of a large sapphire single crystal growth using Kyropoulos method. The influence of gas pressure on thermal field, solid-liquid interface shape, gas velocity field and von Mises stress were studied for the first time. It is found that…
This paper deals with chain graph models under alternative AMP interpretation. A new representative of an AMP Markov equivalence class, called the largest deflagged graph, is proposed. The represen...
Crystallization of liquids in the system CaO‐MgO‐Al 2 O 3 ‐SiO 2 at one atmosphere has been studied at temperatures between the glass transition ( T g ) and the solidus. To determine the textures, compositions and unit‐cell parameters of the crystalline phases, the authors have characterized the experimental charges o…
The present work studies the effect of Fe and Si on the microstructure, mechanical and magnetic properties of three aluminium metal matrix Nd–Fe–B composite magnets. The composite magnets are prepared by squeezing three aluminium alloys (pure Al, A356 alloy and A356 + 0.8%Fe alloy) into preformed Nd–Fe–B magnetic powd…
Abstract Maghnite‐H is a nontoxic catalyst for cationic polymerization of vinylic and heterocyclic monomers. This catalyst is issued from the proton exchange of Algerian montmorillonite clay. One application of this catalyst is to produce polydioxolane derivatives. The polymerization of 1,3‐dioxolane catalyzed by Magh…
A 64×32 liquid-crystal-on-silicon (LCOS) backplane with a novel framebuffer pixel array has been designed and fabricated using the AMI Semiconductor 0.5-µm double-poly triple-metal CMOS process. The pixel circuit described herein increases the brightness significantly without sacrificing image contrast ratio. Characte…
Abstract The performance of insulators is usually affected by the presence of space charges. The evolution of these charges under applied constraints in many cases leads to the degradation of these materials. To evaluate the performance of an insulator it is necessary to study the evolution of the physical and chemica…
Four novel series of periodic copolymers composed of ester and amide units with the same carbon numbers were synthesized by two-step polycondensation reactions using adipate, linear aliphatic diols, and diamines with various chain lengths, ranging from 3 to 6 methylene groups. Effects of the comonomeric and sequential…
Handling of flexible materials is one of the most challenging problems that have arisen in the field of robot manipulators. Besides the difficulties (e.g. geometrical uncertainty, obstacle avoidance, etc.) that emerge when handling rigid materials using robots, flexible materials pose additional problems due to their…
Abstract Austenitic stainless steels exhibit a single-phase, face-centered cubic structure that is maintained over a wide range of temperatures. This chapter provides a basic understanding of grade designations, properties, and welding considerations of austenitic stainless steels. It also discusses general types of c…
Reaction of phenyltrifluorosilane, diphenyldifluorosilane, and methylphenyldifluorosilane with bis(2-hydroxyethyl)amine, methyl-bis(2-hydroxyethyl)amine, methyl-bis(2-trimethylsiloxyethyl)amine, leads to 1,3-dioxa-6-aza-2-silacyclooctane derivatives, (N → Si) quasisilatranes: 1,1-difluoroquasisilatrane, 1-phenyl-1-flu…
A Pr3+-doped NaGd(WO4)2 single crystal has been grown by the Czochralski technique along the (0 0 1) orientation. The refractive indices were measured precisely as a function of wavelength. A Raman spectrum, polarized absorption spectra, fluorescence spectra, and fluorescence decay curve have been recorded at room tem…