Materials Literature
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Pure and doped with Urea Phosphate single crystals of Potassium Dihydrogen Phosphate (KDP) were grown by the low temperature solution growth method, adopting the technique of slow evaporation of the solvent for nonlinear optical applications. The change in the growth habit of the doped KDP crystals has been reported.…
Process for production of sulfur nanoparticles with an average size of 20 nm from an aqueous solution of potassium polysulfide by its mixing with various inorganic and organic acids was considered. It was found that, in the course of time, sulfur nanoparticles are coarsened into micrometer agglomerates, which, in turn…
Mesoporous yttrium aluminum garnet Y 3 Al 5 O 12 powders were prepared using sol-gel technology proceeding from solutions of metal alkoxoacetylacetonates. Xerogel microstructure was studied by SEM, and the fact of mesopores being formed was established. The temperature range within which Y 3 Al 5 O 12 crystallizes in…
O gênero Sida pode se tornar uma fonte alternativa bastante promissora para a produção de painéis de madeira aglomerada, uma vez que é utilizado na fabricação de cordas, em razão da qualidade de suas fibras, porém, são inexistentes pesquisas relacionadas à produção de painéis de aglomerado, utilizando este material li…
Mesenchymal stem cells (MSCs) are multipotent stem cells that can differentiate into a variety of cell types. Therefore, they are widely explored in regenerative medicine. The interaction of MSCs with biomaterials is of great importance for cell proliferation, differentiation and function, and can be strongly influenc…
Iron phosphate glasses, xFe2O3.(100−x)P2O5 {hereinafter denoted xFe.(100−x)P}, are not only of potential commercial importance for the immobilisation of plutonium containing and other high level nuclear wastes but are also of great scientific interest in that, at low temperatures, they exhibit short range antiferromag…
The 49 type I natural pink diamonds examined exhibit color restricted to lamellae or bands oriented along {111} that are created by plastic deformation. Pink diamonds fall into two groups: (1) diamonds from Argyle in Australia and Santa Elena in Venezuela are heavily strained throughout and exhibit pink bands alternat…
The adsorption of methane (CH 4 ) molecule on the pristine and Al-doped (4, 8) graphene was investigated via the first-principles calculations. The results demonstrated that, in comparison to the adsorption of a CH 4 molecule on the pristine graphene sheet, a relatively stronger adsorption was observed between the CH…
Based on the analysis of our own and literature data, as well as on the principles of nonequilibrium thermodynamics, the influence of plastic deformation on the diffusion, structural, and phase transformations in solids at different temperatures is considered. The main regularities for all effects can be explained fro…
Problems of X-ray diffraction analysis of ultradisperse systems with the particle size up to 5 nm are discussed in the review. A method for calculating X-ray diffraction patterns using the Debye formula within the kinematic theory of X-ray scattering (Debye Function Analysis-DFA) is presented. The DFA method makes it…
A phase field model based on the time-dependent Ginsburg-Landau equation is developed to investigate the space charge distribution effects on the ferroelectric hysteresis characteristics of the ferroelectric thin film, in which the inhomogeneity of the built-in electric field (Eib) distribution along the vertical dire…
The corrosion inhibition process of carbon steel in 1 M HCl by octadecylbenzene sulfonic acid (H) and their three ester derivatives (H1, H2, and H3) were studied. The esters were quaternized by n-butyl bromide to get (H1Q, H2Q, and H3Q). These products have been investigated as corrosion inhibitors using weight loss a…
Although electrospinning is the most widely used nanofibers making technique due to its simplicity, low production rate and dependence on high voltage power supply are the main dilemmas. Moreover, completely non conductive polymers solutions cannot be electrospun which adds further constrain. In this study, we introdu…
Phoscorites and carbonatites of the Khibina alkaline massif, Russia contain three minerals of the pyrochlore group. They are, in order of crystallization: uranpyrochlore and pyrochlore in the phoscorites, and pyrochlore and bariopyrochlore in late calcite carbonatites. Early calcite carbonatites also contain uranpyroc…
The sub-micrometer PbS with anisotropic microstructures including fishbone-like dendrites, multipods, cubes, corallines, and hopper cubes were successfully prepared by the solvothermal process. Different morphologies can be obtained by adjusting the reaction temperatures or using the nontoxic controlled reagents which…
Mullite whiskers were prepared from Si powders in molten Al 2 (SO 4 ) 3 -Na 2 SO 4 mixture salts with different Al/Si molar ratio ( R ) of raw materials. The resulting mullite whiskers, had been investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometer (EDS) and inf…
Encapsulation of alkali metals (Li, Na, K, and Rb) into Zn12O12 nanocage has been investigated using density functional theory. Encapsulation of Li and Na atoms is found to be thermodynamically favorable at 298 K and 100 kPa, with negative Gibbs free energy change ΔG of about −130.12 and −68.43 kJ/mol, respectively. B…
Abstract Transition metal promoted oxidative degradation reactions impact quality, shelf‐life, and nutritional content of many packaged foods. When trace metals are present in packaged foods, they can initiate degradation of nutritional compounds such as unsaturated fatty acids, carotenoids, antioxidants, phytosterols…
The energy use in buildings has to be decreased to reach the targets and regulations in the European Union. One way of reducing the energy demand is to use vacuum insulation panels (VIP) in the building envelope. To make sure the declared thermal properties of the VIP are valid for the mounted panels, in situ measurem…
Abstract Roughly a decade ago an outstanding thermoelectric Figure of merit ZT of 2.4 was published for nanostructured Bi 2 Te 3 /Sb 2 Te 3 ‐based thin film superlattice (SL) structures. The results strongly fueled and renewed the interest in the development of efficient novel nanostructured thermoelectric materials.…