Materials Literature
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The purpose of this work is to describe, with numerical simulation, the space charge behavior in polymeric materials. Particular intent is accorded to the variation of the thermo-electrical constraints. The simulation is performed for a range of the electric field from 10 to 110 MV/m and the space charge behavior was…
Abstract Interstitial nitrides and carbides of early transition metals in groups IV–VI exhibit platinum‐like electronic structures, which make them promising candidates to replace noble metals in various catalytic reactions. Herein, we present the preparation and characterization of nano‐sized transition metal nitries…
A ReaxFF reactive force field is developed and used for molecular dynamics studies of reactions that occur when diethyl zinc is exposed to a graphene surface that has been functionalized with epoxide groups. From past experiments, it is known that these conditions lead to zinc oxide nanoparticle formation. Molecular d…
Selective growth of either monolayer or bilayer graphene is of great importance. We developed a method to readily tune large area graphene growth from complete monolayer to complete bilayer. In an ambient pressure chemical vapor deposition process, we used the sample temperature at which to start the H2 flow as the co…
An advanced scanning magnetoresistive microscopy (SMRM) - a robust magnetic imaging and probing technique - will be presented, which utilizes state-of-the-art recording heads of a hard disk drive as sensors. The spatial resolution of modern tunneling magnetoresistive sensors is nowadays comparable to the more commonly…
This paper presents a computational approach to predict elastic propertiesof hybrid nanocomposite material prepared by adding nano-clayplatelets to conventional CNT-reinforced epoxy system. In comparison to polymers alone/single-fiber reinforced polymers, if an additional fiber is added to the composite structure, it…
Thermal decomposition of Ln 2 (C 2 O 4 ) 3 · 9H 2 O concentrate (Ln = La, Ce, Pr, Nd) in the presence of CaC 2 O 4 · H 2 O was studied by X-ray diffraction, thermogravimetry, and chemical analysis. Annealing at temperatures above 374°C in the absence of calcium oxalate gives rise to the solid solution of CeO 2 -based…
Within a continuum approximation, we present a thermomechanical finite strain plasticity model which incorporates the blended effects of micro-heterogeneities in the form of micro-cracks and micro-voids. The former accounts for cleavage-type of damage without any volume change whereas the latter is a consequence of pl…
Abstract A detailed investigation of the thermoluminescence (TL) properties of γ -ray and C 5+ ion beam irradiated K 2 CaMg(SO 4 ) 3 :Dy (KCM) phosphor was carried out. KCM was irradiated by 50 and 75 MeV energy C 5+ ion beams with a fluence range of 15 × 10 10 ions cm −2 to 30 × 10 12 ions cm −2 . The TL glow curves…
Considerable attention is currently devoted to producing a cold-resistance pour point depressant (PPD) via the emulsification process. The aim of this study is to optimize the emulsification process parameter as to yield a stable emulsion. Shearing intensity, temperature and time of the emulsification were studied as…
Improved optical side coupling efficiency was demonstrated for spiral patterned zinc oxide (ZnO) nanorods coated large core plastic optic fibers (POFs) as opposed to unpatterned continuous coatings. ZnO nanorods were grown by the hydrothermal method directly onto POF surfaces. Nanorods coating enhanced coupling inside…
Enhanced transmission, and specifically tunable enhanced transmission, of microwaves through a subwavelength metal aperture is of major significance for a variety of microwave applications. In this study, by placing a metamaterial resonator into a subwavelength aperture, we experimentally and numerically demonstrated…
When brushes are removed from an ink bath, they sometimes show unwanted droplets, which may accidentally drop on surfaces. Our theory predicts that Chinese calligraphic brushes eliminate the unwanted droplets by closing their ends. The ends of the brushes are closed when the length L of their fibers is longer than a c…
Abstract Three compounds ASb2(SO4)2(PO4) (A = H3O+, K, Rb) were obtained from the reactions of Sb2O3, A2CO3 (A = Li, Rb) or K2SO4 and NH4H2PO4 in H2SO4 (98 %) at 220–250 °C. Their structures were determined by single‐crystal X‐ray diffraction. All compounds crystallize in the triclinic space group P$\bar{1}$ (no.2) an…
The main objective of this contribution is to present an empirical model of ice-covered insulator flashover in accordance with an important flashover index, called icing stress product (ISP). The ISP as the product of the ice mass per centimeter of insulator length and the electrical conductivity of the melted ice acc…
Epoxy resin is widely used as an insulating material in high voltage applications. Ceramic fillers are always added to the polymer matrix to enhance its mechanical properties. But at the same time, filler materials decreases the electrical properties. So while making the fly ash epoxy composite, it is obvious to detec…
We study the transport properties in a ferromagnetic/nonmagnetic/ferromagnetic (FNF) silicene junction in which an electrostatic gate potential, U, is attached to the nonmagnetic region. We show that the electrostatic gate potential U is a useful probe to control the band structure, quasi-bound states in the nonmagnet…
Our density functional theory calculations show that the energy gap of bilayer α -graphyne can be modulated by a vertically applied electric field and interlayer strain. Like bilayer graphene, the bilayer α -graphyne has electronic properties that are hardly changed under purely mechanical strain, while an external el…
In this study, synthesis of composites based on methyl methacrylate (MMA)-asphaltenes matrix was investigated with different amounts of Arabian heavy asphaltenes. The in situ polymerization technique was used with dispersion of the asphaltene molecules into the MMA monomer mixture. Thermal degradation characteristics…
Biologically stabilized gold nanoparticles were synthesized from the flower aqueous extract of T. divari- cata. The synthesized nanoparticles were characterized by UV-Vis spectrophotometer, Zeta sizer, FTIR and TEM analysis. T. divaricata reduced gold nanoparticles having particle size and potential of 106.532 nm and…