Materials Literature
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We have investigated dynamical heterogeneity in a highly supercooled liquid using molecular-dynamics simulations in three dimensions. Dynamical heterogeneity can be characterized by three quantities: correlation length $\xi_4$, intensity $\chi_4$, and lifetime $\tau_{\text{hetero}}$. We evaluated all three quantities…
Nos estudamos os efeitos da quebra de simetria e de desordem no espectro de energia de um eletron numa bicamada de grafeno. O problema foi abordado atraves de simulacoes numericas considerando um Hamiltoniano tight-binding para uma rede retangular topologicamente equivalente a rede hexagonal do grafeno que nos permite…
Les carbones nanostructurés sont très largement utilisés dans les systèmes de stockage et conversion d'énergie par voie électrochimique, par exemple en tant que matériau d'électrode de pile à combustible et de batterie ou encore de supercondensateur. La structure du carbone ainsi que sa chimie de surface sont des para…
Une série de films Ti1-xAlxN (0 ≤ x ≤ 1, teneur en Al) de différentes épaisseurs (300 – 500 et ≃ 2000 nm) a été déposée par pulvérisation magnétron en atmosphère réactive sur des substrats en Si(l 00) et en acier rapide. Des indentations Vickers ont été réalisées sur les films déposés sur acier à des charges de 0,5 et…
Thesis (M. Tech.) (Engineering: Electrical, Dept.: Electronic Engineering))--Vaal University of Technology, 2008.
We experimentally study the detachment of drops of granular suspensions using a density matched model suspension with varying volume fraction ({\phi} = 15% to 55%) and grain diameter (d = 20 {\mu}m to 140 {\mu}m). We show that at the beginning of the detachment process, the suspensions behave as an effective fluid. Th…
The skin friction and cross-flow separation location on a non-body-of-revolution (non-BOR) ellipsoidal model performing constant-yaw turns and a pitch-up maneuver, each with roll oscillation were studied for the first time. The detailed, low uncertainty, flow topology data provide an extensive experimental database on…
ADVERTISEMENT RETURN TO ISSUEEditorialNEXTMaterials in a Space EnvironmentTimothy K. MintonJean-Francois Roussel and Jean-François RousselCite this: ACS Appl. Mater. Interfaces 2010, 2, 10, 2687–2688Publication Date (Web):September 9, 2010Publication History Received21 August 2010Published online9 September 2010Publis…
Glass-forming and shape memory metals may provide a route to fabricating materials with enhanced mechanical properties.
Abstract A simple, efficient, and widely applicable method is reported.
Abstract The title compound is prepared by solid state reaction of a stoichiometric mixture of Na2CO3, (NH4)2HPO4, Fe2O3, and SnO2 (200, 600, and 950 °C, 48 h) and characterized by powder XRD, UV/VIS diffuse reflectance spectroscopy, magnetic measurements, and Moessbauer spectroscopy.
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We present our reproducible technique of achieving two bypasses from selected pedicled internal thoracic arteries. We feel that awareness of this technical modification is to the benefit of patients.
Cover: The picture presents a scanning electron microscopy image of the foam structure of a glycerol-plasticized wheat gluten material that is produced by freeze drying. The insert shows an optical image of this wheat gluten foam without glycerol. Further details can be found in the article by T. O. J. Blomfeldt, R. T…
Ion bombardment has been shown to be capable of enhancing the interlayer exchange coupling in a trilayer system that exhibits giant magnetoresistance. We demonstrate that this phenomenon can be derived from the phase coherence among scattered paths within the two rough interfaces when their topographies are correlated…
Amorphous films Zr 0.8 Si 0.2 O 2 were deposited on quartz substrates at room temperature, by using pulsed laser deposition technique. After annealing at high temperature, Zr 0.8 Si 0.2 O 2 films suffer a phase separation to precipitate tetragonal ZrO 2 nanocrystals in ZrSiO 4 amorphous matrix. Their crystal structure…
Nano-scale Al -doped silicon films are prepared by magnetron sputtering. The amount of Al doped in the films is controlled by regulating the Al sputtering power and duration. With appropriate amount of Al , the Seebeck coefficient of the Si films at room temperature is larger than 168 μV/K, which increases with temper…