Materials Literature
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Based on the digitized electron micrographs, we investigate a temperature evolution of Co/C film. The simple in usage quantitative characterization of the spatial disorder for systems of point objects has been employed. We show that a dominant increase of spatial inhomogeneity of cobalt phase is shifted towards the la…
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Diffusion of deuterium in diamondlike carbon films with different Si contents deposited by a pulsed arc discharge method in deuterium atmosphere was studied. The concentration profiles of D were measured by secondary-ion-mass spectrometry and elastic-recoil-detection techniques. A model is proposed to describe the exp…
We report the results of a ${}^{51}\mathrm{V}$ and ${}^{69}\mathrm{Ga}$ nuclear magnetic resonance (NMR) study of ${\mathrm{Fe}}_{2}\mathrm{VGa}$ at temperatures between 4 and 450 K. The presence of magnetic antisite defects is deduced from the NMR linewidth, which displays a Curie-law temperature dependence. The abse…
The adsorption of CO on ${\mathrm{TiO}}_{2}(110)$ is investigated using the full-potential linearized-augmented-plane-wave method. The equilibrium structures of the clean and adsorbed ${\mathrm{TiO}}_{2}(110)$ surfaces are optimized through total-energy and atomic force calculations. Two geometries of CO absorption, n…
The atomic and electronic structure of the $[0001]/(1\ifmmode\bar\else\textasciimacron\fi{}2\ifmmode\bar\else\textasciimacron\fi{}30) \ensuremath{\Sigma}=7$ symmetric tilt boundary in ZnO has been investigated by an ab initio plane-wave pseudopotential method within the local-density approximation. Two types of equili…
A thermodynamic description of the Peltier heat at the aluminum and the oxygen electrode in the system NaF–AlF 3 –Al 2 O 3 is given. The thermoelectric power in melts with molar ratios n NaF / n AlF3 from 3.0 to 1.0, saturated with alumina are measured. Seebeck coefficients for molten fluoride electrolytes saturated w…
Recently, depletion forces were accounted for by a contraction of the description based on the integral equations theory of simple liquids [Phys. Rev. E 61, 4095 (2000)]. The extension of those results to the case of inhomogeneous systems is reported here. Besides, the energetic contributions to the wall-particle depl…
We perform Monte-Carlo simulations to obtain quantitative results for the anomalous Hall resistance, ${R}_{A},$ observed in colossal magnetoresistance manganites. ${R}_{A}$ arises from the interaction between the spin magnetization and topological defects via spin-orbit coupling. We study these defects and how they ar…
In a recent paper it has been proposed that the four-orbital model of Gouterman should be replaced by a new band assignment scheme for the MPc UV−visible absorption spectrum. Since this proposed assignment scheme would alter the basis for the spectral analysis of a wide range of complexes, its validity is tested again…
Lanthanide tris(beta-diketonates) formed stable, 1:1 highly coordinated complexes with amino alcohols, and the resulting complexes exhibited large enhanced fluorescence and intense induced circular dichroism (CD) signals. The stability constants of the highly coordinated complexes were determined for various combinati…
A novel one-step soft solution-processing route called the solvothermal-copolymerization technique was successfully developed for in situ fabrication of polystyrene (PS)/CdS nanocomposites embedded with CdS nanowires in ethylenediamine media at lower temperatures (80−140 °C). In this route, the polymerization of the m…
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans the biological, physical, and social sciences.
It is shown that a nonperiodic Kronig-Penney model exhibits mobility edges if the positions of the scatterers are correlated at long distances. An analytical expression for the energy-dependent localization length is derived for weak disorder in terms of the real-space correlators defining the structural disorder in t…
The secondary structures of wheat gliadins (a major storage protein fraction from gluten) in film-forming solutions and their evolution during film formation were investigated by Fourier transform infrared spectroscopy. In the film-forming solution, wheat gliadins presented a mixture of different secondary structures,…
Fluorinated armchair (10,10) and zigzag (18,0) single-wall carbon nanotubes (F-SWNT) of ${\mathrm{C}}_{2}\mathrm{F}$ stoichiometry with five different fluorine atom decorations are studied using density-functional theory and periodic boundary conditions. The most stable armchair F-SWNT isomers $(1a$ and $5a)$ are meta…
We study propagation dynamics of a particle phase in a single-file pore connected to a reservoir of particles (bulk liquid phase). We show that the total mass $M(t)$ of particles entering the pore up to time $t$ grows as $M(t) = 2 m(J,ρ_F) \sqrt{D_0 t}$, where $D_0$ is the "bare" diffusion coefficient and the prefacto…
The theoretical studies of optical properties of Ga$_{1-x}$In$_x$As self-assembled quantum-wires (QWR's) made of short-period superlattices with strain-induced lateral ordering are presented. Valence-band anisotropy, band mixing, and effects due to local strain distribution at the atomistic level are all taken into ac…
Molecular dynamics simulations of diluted (~2.5 weight percent) aqueous solutions of two polyelectrolytes, namely sodium carboxy methyl cellulose (CMC) and sodium poly(acrylate) (PAA) have been performed. Water and counterions were taken into account explicitly. For CMC the substitution pattern and starting conformati…
In this letter, we report on the excitation efficiency of erbium ions by hot electrons and holes in Si:Er:O and Si1−yCy:Er pn diodes at 10 K. In forward bias, a higher electroluminescence efficiency at 1.54 μm is observed for incorporating the erbium ions in the p region of the diode, where enough holes are present to…