Materials Literature
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It was shown that self-organization with the development of nano- and microstructures is typical for soil gels. Humic substances (HSs), which form the basis of soil gels, have a multilevel structural organization. They appear due to weak interactions during the aggregation of low-molecular-weight organic substances, w…
The damage recovery process for magnetic tunnel junctions (MTJs) after methanol- (Me-OH) based plasma etch has been demonstrated. Me-OH and O2 plasma, which contain oxygen in the molecule, caused unavoidable modification of magnetic materials in the MTJ stack. For example, the magnetization saturation and MR ratio dec…
Abstract The kinetics of clustering in Al–Mg–Si alloy is studied by means of Kinetic Monte Carlo simulations. The simulations take into account the probability of vacancy jumping to nearest neighbour sites. This probability is calculated by considering both the activation energies for single vacancy migration and the…
The extraction behavior of neptunium was investigated from Pressurized Heavy Water Reactor Simulated High Level Waste (PHWR-SHLW) using 0.05 M N,N,N',N'-tetraoctyl diglycolamide (TODGA) + 5% iso-decanol dissolved in n-dodecane as the extractant. Batch extraction data revealed that the extraction of Np(IV) was a magnit…
This paper addresses the analysis of probabilistic corrosion time initiation in reinforced concrete structures exposed to ions chloride penetration. Structural durability is an important criterion which must be evaluated in every type of structure, especially when these structures are constructed in aggressive atmosph…
Abstract Clay minerals associated with intra-volcanic bole horizons of varied colours and thicknesses contain montmorillonite, halloysite and kaolinite, show distinct microstructures and microaggregates. In kaolinite, Fe3+ ions substitute for Al3+ at octahedral sites. Most of these clays are dioctahedral type, show ba…
This work focuses on the dielectric properties of a UV-cured epoxy network with a low glass transition temperature obtained through photoinduced copolymerization of a cycloaliphatic diepoxy monomer, 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexanecarboxylate (CE), with 1,6-hexanediol diglycidyl ether (HDGE). The cross…
In this study, titanate nanotubes with a layered structure were investigated for the uptake of radioactive uranium ions for the first time. The nanotubes have been successfully prepared with a reaction of Ti metal nanopowders and NaOH mixed solution by a novel and effective ultrasonic-assisted hydrothermal method. As…
Redmud is a waste product from Alluminium industry. For its bulk utilization a detailed experimental programme was conducted to study the behavior of Redmud when stabilized with GGBS (Ground Granular Blast Furnace Slag) which is a waste product from steel manufacturing plants. In this present study the Redmud was stab…
The electrical and electroluminescence (EL) properties at room and high temperatures of oxide/nitride/oxide (ONO)-based light emitting capacitors are studied. The ONO multidielectric layer is enriched with silicon by means of ion implantation. The exceeding silicon distribution follows a Gaussian profile with a maximu…
The dielectric function of some phthalocyanine compounds (ZnPc, H2Pc, CuPc, and FePc) were inves- tigated by analyzing the measured capacitance and loss tangent data. The real part of the dielectric constant, 1, varies strongly with frequency and temperature. The frequency dependence was expressed as: 1 D A! n , where…
The role of a diffusion current in the phase dynamics of a system of coupled Josephson junctions (JJs) has been analyzed. It is shown that, by studying the temporal dependences of the superconducting, quasi-particle, diffusion, and displacement currents and the dependences of average values of these currents on the to…
The effect of delta-doping on the performance of ten-period Ge/Si quantum-dot (QD) mid-infrared photodetectors (λmax≃3.4 μm) was investigated. Ge QDs fabricated by molecular-beam epitaxy at 500 °C are overgrown with Si at 600 °C. Each Si barrier contains a boron delta-doping layer located near the QD plane to provide…
The existence of a highly ordered, two-dimensional, Sn/Ag alloy on Si(111) is reported in this study. We present detailed atomic and electronic structures of the one atomic layer thick alloy, exhibiting a 2 × 2 periodicity. The electronic structure is metallic due to a free-electron-like surface band dispersing across…
The influence of welding-induced residual stress and distortion on the behaviour of welded, flat-bar stiffened plates under uniaxial compression is examined, using finite-element simulation techniques. Residual stresses and distortions due to welding are simulated by three-dimensional thermo-elasto-plastic finite-elem…
During the dyeing process in baths approximately 10 to 15% of the dyes used are lost and reach industrial effluents, thus polluting the environment. Studies showed that some classes of dyes, mainly azo dyes and their by-products, exert adverse effects on humans and local biota, since the wastewater treatment systems a…
BACKGROUND: The purpose of this study was to investigate the downregulation of mRNA expression of vascular endothelial growth factor (VEGF) by triamcinolone acetonide acetate (TAA)-loaded chitosan nanoparticles in human retinal pigment epithelial cells. METHODS: TAA-loaded deoxycholic acid-modified chitosan (TAA/DA-Ch…
The isothermal and adiabatic n th-order ( n ≥ 2) elastic constants of a loaded crystal are defined. These constants fully determine the behavior of solids at an arbitrary load and are controlled by both an interatomic interaction and an applied load. Expressions that relate these constants (of the second, third, and f…
Diesel engine emissions of oxides of nitrogen and smoke can be reduced simultaneously through the use of high levels of exhaust gas recirculation to achieve low-temperature combustion. However, single fuel injection per cycle diesel low-temperature combustion is also characterized by high fuel consumption and high tot…
We present a straightforward method to realize nonplanar dielectric structures with a controlled height profile for use in calibration of fluorophores. Calibration of fluorescence quantum efficiency and intrinsic radiative and nonradiative decay rates of emitters is possible by using changes in the local density of op…