Materials Literature
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Reflection and transmission spectra of Ba 0.7 Sr 0.3 TiO 3 films with thicknesses of 36 and 800 μm on the MgO substrate are measured in the frequency range from 8 to 1000 cm −1 at room temperature. The dielectric parameters of the film material are derived using the simulation method. The dependence of the permittivit…
Police officers' clothing needs were analysed related to ballistic vests and ballistic vest aspects that influenced wearer comfort were identified. Branson and Sweeney's Clothing Comfort Model served as a framework to assess eight attributes of the person, clothing and environment that were identified in a previous st…
Abstract Two newly synthesized Enaminone compounds ethyl-3-[(2-aminoethyl) amino]-2-butenoate (compound I) and ethyl-3-(2-aminoanilino)-2-butenoate (compound II)) in 0.5 M H 2 SO 4 on AISI 316 have been investigated at 20 to 50 ºC using weight loss and potentiostatic polarization techniques. The percentage inhibition…
Changes of growth morphologies are induced by a perturbation of the thermal diffusion field in the surrounding melt of a growing xenon crystal. Apart from the dendritic morphology, seaweed and doublon morphologies and for the first time transitions from dendritic to triplet structures (first predicted by T. Abel, E. B…
The aim of the study is to find anti-inflammatory activity of the compound obtained from the petroleum ether extract of the fruits of Dregea volubilis . Fruits of Dregea volubilis were extracted by petroleum ether and through column chromatography led to obtain a compound. The structure of the compound was determined…
Single- and polycrystalline tungsten samples were implanted with 30 keV3He ions to fluences of 5e16, 4e17 and 5e18 He/cm2 at temperatures ranging from ˜850 - 1000 °C. After implantation tungsten’s retention characteristics were studied using 3He(d,p)4He nuclear reaction analysis (NRA) and 3He(n,p)T neutron depth profi…
A rapid synthesis process for local growth of the aligned carbon nanotube (CNT) bundle arrays in a quartz tube operated at room temperature is reported. The CNT bundles of 105 microm in length and 130 microm in diameter were thermally and locally synthesized on the wafer areas where the micro-heaters were integrated o…
Several efforts have been made to predict the mechanical properties of structural foams, mainly under tensile and flexural loading modes. The prediction of the mechanical behavior of foams subjected to impact loads remains, however, an unfulfilled challenge. Several investigations have studied the variation of impact…
A sterically encumbered m-terphenyl oxacyclophane substituted with two aryl iodide substituents has been prepared as a versatile monomer for the preparation of π-conjugated polymers. The monomer has been used to prepare a poly(p-phenylene ethynylene) derivative (P1) incorporating oxacyclophane units as canopies that s…
A layer-by-layer assembly technique is used to coat layers of nano-thin-films of pH indicator on a U-bend optical fibre to create an effective sensor, using neutral red as the active element. The experimental results characterizing such a pH sensor shows a wide pH sensing range (from pH5 to pH10) fast response.
We report on the results of a large-scale molecular dynamics simulation study of shock-wave propagation in pristine amorphous silicon carbide and carbon-nanotube-reinforced amorphous silicon carbide matrix composites. We seek to understand the effects of ensembles of aligned nanotubes, both transversely and longitudin…
Liquid crystalline phthalocyanine bearing eight oligo(ethyleneoxy) peripheral substituents forms homeotropically aligned films on the hydrophilic surface, whereas planar alignment with a random distribution of the column directors occurs on the hydrophobic surface.
We study the electronic transport in a graphene-based ferromagnet/insulator/ d -wave superconductor (F/I/S) junction by use of the Dirac-Bogoliubov-de Gennes equation. The effects of spin polarization in the F region, barrier strength in the I region, and Fermi wave vector mismatch between the F and S regions are take…
Eu2+-doped silicate glasses were prepared in the system 42SiO2- gammaCaO-(38gamma)SrO-20MgO- 0.2EuO (gamma = 0, 10, 20, 30, 38) by melting under reducing atmosphere. Glass ceramics precipitated with M2MgSi2O7:Eu2+(M = Sr, Ca) phosphor were obtained by heat-treatment of the glass. They showed broad emission band due to…
One-dimensional core-shell polymer nanowires offer many advantages and great potential for many different applications. In this paper we introduce a highly versatile two-step template wetting process to fabricate two-component core-shell polymer nanowires with controllable shell thickness. PLLA and PMMA were chosen as…
We present the results of time and temperature dependent deformation of two azobenzene materials with different dipole moment during the process of surface relief grating formation. The effect of chromophore orientation on grating formation in these films was studied in situ using continuous and pulselike exposure tec…
The selective catalytic oxidation (SCO) of ammonia has been investigated on a portion of the H-ZSM5 framework which contains 5T atoms by using density functional theory, representing H-form zeolites. The mechanism was subdivided into three main blocks: (I) the direct reaction of NH 3 with oxygen, leading either to HNO…
The Ba0.65−xSr0.35MgxTiO3 ceramics was prepared by conventional solid method. The effects of the Mg2+ content on the crystal structure and dielectric properties of Ba0.65−xSr0.35MgxTiO3 ceramics were investigated. The results show that as the Mg2+ content increases, the influence of Mg2+ on the crystal structure of Ba…
The pattern of partial discharge (PD) occurrence at a defect site within a solid dielectric material is influenced by the conditions of the defect site. This is because the defect conditions, mainly its size and location determine the electric field distributions at the defect site which influence the patterns of PD o…
Er2O3 coating for tritium permeation barrier has been fabricated on steel substrates by a filtered arc deposition method at room temperature and 973 K. Thermal expansion of the oxide layer and the substrate induced peel-off of the coating. The non-crystalline layer is thought to play a role in forming a uniform surfac…