Materials Literature
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Abstract An optimized and high-performance Monte Carlo simulation is developed to take thorough account of the influence of chain-length-dependent termination rate constant on polymer microstructure in ATRP. According to the simulation results, bimolecular termination rate constant sharply drops throughout the polymer…
Abstract Ge, GeTe, and GeSbTe (GST) films are grown on both planar TiAlN/Si substrates and a trench structure (diameter 120 nm; depth 200 nm) using layer‐by‐layer, metal‐organic (MO) CVD. The GeTe and GeSbTe films completely fill the trench structure, and show well‐crystallized phases with a rhombohedral and hexagonal…
This paper investigates the parameters of aerosol particles that occur in the course of spontaneous vapor thermal condensation and bubbling of the saline blend in 66 LiF-34 BeF2 eutectic compound (mol %) with helium in the vertical-bubbles flow mode in an ampoule device to create medical reactor radioisotopes produced…
Abstract This work deals with the study of the processability of blends based on PA6 and NBR. The aim is to achieve reduced PA 6 melting temperatures in order to avoid degradation of the NBR phase during processing. The effect of different additives in PA has been studied. For this purpose PA6 was blended with nonylph…
We present our investigation on the critical behavior of the spinel compound CdCr2S4 via the ac susceptibility and dc magnetization measurements. The analysis of ac susceptibility in terms of scaling behavior yields exponent values of δ=5.38±0.01, γ+β=1.77±0.03 and γ=1.44±0.02. Both δ and γ are slightly larger than th…
The carrier type reversal (CTR) from p- to n-type in semiconducting chalcogenide glasses is an important and a long standing problem in glass science. Ge–Se glasses exhibit CTR when the metallic elements Bi and Pb are added. For example, bulk Ge42−xSe58Pbx glasses exhibit CTR around 8–9at.% of Pb. These glasses have b…
Scrap tire bales are typically treated as discrete elements that consist of approximately one hundred (100) scrap tires compressed into a 4.5 foot by 5 foot by 2.5 foot block. The advantage of baling tires is that a volume reduction of approximately ten is achieved, and handling bales is much simpler, and therefore ch…
The selective cleavage of the strong and poorly reactive Si-O-Si bond in functionalized siloxanes under mild conditions is a decisive task for modern synthetic chemistry. Simple treatment of the aminomethyl-functionalized disiloxanes 1, 6, (R,R)-7 and 8 ([R 2 (CH 2 NR')SiO] 2 , R =Me or Ph, NR'= NC 5 H 10 , NC 5 H 8 (…
The influences of Mn doping on the electrical and optical properties of the Zn1−xMnxO:N films have been investigated. Mn incorporation occupying on the Zn site has led the lattice constants and the bandgap of the films increased with the structural quality deteriorated. The electrical properties have been found to cha…
The electronic properties of films of unoriented single-walled carbon nanotubes were studied by transmission measurements as a function of pressure. The energies of the optical transitions between the Van Hove singularities decrease with increasing pressure, which can be attributed to pressure-induced hybridization an…
In this paper, we report ab initio calculations of the vibrational and structural properties of ZnAl2O4 and ZnGa2O4 spinel structures. The calculated vibrational modes at zero pressure, at the Γ point and the complete phonon spectrum of both compounds are presented. Also, we report our findings for the high-pressure s…
In this work, the biodegradable poly(lactic acid) (PLA)/organic-montmorillonite (O-MMT) nanocomposites were successfully prepared by the in situ polymerization intercalation process of D,L-lactide with organically-modified montmorillonite which was first treated by Cu cations and second treated by n-hexadecyl trimethy…
Considering carbon nanotubes as a rolled-up graphene sheet, the basic properties of the Raman scattering of nanotubes can be predicted from the Raman of graphite. We expect increased pressure coefficients if the nanotubes are impermeable to the pressure medium and the same as graphite if they are filled; also if they…
The Ni-Mn-Ga alloys extruded at high temperature with a relatively large reduction rate were the subject of the studies. The microscopic observations of the transient zone in the extruded rods revealed rotation of the columnar grains in the ingot along the rod axis - giving the preferred <001> orientations. Comp…
In this work, investigations of structural, optical and electrical properties of transparent oxide semiconductor thin films based on TiO 2 doped with Eu, Pd and Tb, Pd have been presented. The transparent oxide semiconductor nanocrystalline thin films were prepared by magnetron sputtering process. It was shown that do…
Protective clothing systems composed of permselective polymer film laminates are an alternative to standard air-permeable garments based on activated carbon. These polymer layers are designed with high water vapor permeation rates and low permeation of chemical warfare agents. Polymer films that have a significant wat…
monomer from 1.0×10 -2 to 7.0×10 -2 mol L -1 and concentration of potassium persulphate from 1.0×10 -3 to 7.0×10 -3 mol L -1 at ferrous sulphate concentration varying from 1.0×10 -3 to 7.0×10 -3 mol L -1 in the reaction mixture. The graft yield and other grafting parameters have been optimized at 3.0×10 -2 mol L -1 mo…
Abstract The isothermal crystallization behavior of a segmented copolymer constituted by hard blocks of polyglycolide and soft segments derived from the copolymerization of glycolide and trimethylene carbonate was investigated. This polymer has applied relevance because it is one of the most widely used for bioabsorba…
Composite right/left-handed (CRLH) metamaterials have demonstrated unique and advantageous features when employed in microwave and millimeter-wave circuits and systems. In this paper, an overview of the CRLH metamaterials is addressed by introducing the dispersion-engineerable property from the equivalent unit-cell ci…
In this paper, a dielectric slab with the periodic implantation of the air gap in the host passive substrate material has been analyzed. The effective permittivity of the photonic crystal with host material PTFE at 600GHz has been extracted with the help of robust method to retrieve the constitutive effective paramete…