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Band dispersion and bonding character of potassium on graphite
Surface Science, 2008Abstract The band dispersion of potassium on highly oriented pyrolytic graphite (HOPG) has been studied by angle-resolved photoemission spectroscopy (ARPES). The ARPES around the K point shows shifts of the π and π ∗ bands toward higher binding energies upon K adsorption in the submonolayer regime, showing charge transfer from the adsorbed potassium
Nozomu Kamakura +2 more
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Guiding modes of semi-infinite nanowire and their dispersion character
Journal of Optics, 2014Conventionally, the optical properties of finite semiconductor nanowires have been understood and explained in terms of an infinite nanowire. This work describes completely different photonic modes for a semi-finite nanowire based on a rigorous theoretical method, and the implications for the finite one.
Yuming Sun +3 more
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Ranking Characters by a Dispersion Criterion
Nature, 1973IT is often proposed by taxonomists and ecologists that classifications and other related analyses should be based on the possible largest number of characters. They believe that when large character sets are used the analysis will gain in accuracy, and the results will be more broadly applicable. Yet sampling, computational and other logistic problems
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Transmission characters numerical simulation of soliton based on dispersion-managed
SPIE Proceedings, 2010Exact soliton solution of the nonlinear Schrodinger equation is achieved in the Dispersion-managed soliton system based on a numerical averaging scheme, so the simulation results show that it can traverse great long distances stably. By the Split-step Fourier Method, we simulate soliton evolution in the Dispersion-managed soliton system.
Xun Lu, Dongsheng Wang
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Dispersive character of optical phonons in GaAlAs alloys from Raman scattering in superlattices
Physical Review Letters, 1989Etude du caractere dispersif bien defini des phonons dans un cristal mixte de la famille III-V. La diffusion Raman dans des superreseaux a courte periode met en evidence plusieurs modes de vibration confines dans les couches de GaAlAs. Cette technique permet de placer des points experimentaux sur la courbe representant la dispersion des phonons, en ...
, Jusserand, , Paquet, , Mollot
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Influence of disperse phase concentration on character of Brownian motion of particles
Journal of Colloid and Interface Science, 1990Abstract Brownian motion in concentrated suspensions of solid spherical particles was modeled by a computer experiment. The mean collision number and the self-diffusion coefficient of particles were obtained. The collision number per time unit was calculated to be immeasurable because of the fractal character of the Brownian trajectories.
Andrey Lukyanov +2 more
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Study on Dispersion Character of Fine Oolitic Hematite Ore Particle
Applied Mechanics and Materials, 2011The fine oolitic hematite ore (＜20μm) is easily covered by the ore slime, therefore, it is processed very difficultly with traditional crafts, for example, gravity treatment, magnetic separation, and flotation. The tiny iron ore is unable to recycle effectively, bring about a large of useful minerals running off.
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Evolution of fruit characters and dispersal modes in the tropical family Rubiaceae
Biological Journal of the Linnean Society, 1992We investigated the evolution of fruit characters, animals versus abiotic dispersal modes, life forms and geographical distribution, in the large, mostly tropical, family Rubiaceae. As a basis for our analysis we used a phylogenetic tree derived from chloroplast DNA variation.
B. BREMER, O. ERIKSSON
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The orbital characters and k dispersions of bands in iron-pnictide NaFeAs
Journal of Physics and Chemistry of Solids, 2011Abstract The electronic structure and orbital characters of iron-pnictide NaFeAs have been studied by polarization dependent angle-resolved photoemission spectroscopy. Some of the bands are mixed with the orbitals of opposite symmetries, which could be interpreted by the hybridization among the bands.
C. He +14 more
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Influence of the acid–basic character of oxide surfaces in dispersants effectiveness
Ceramics International, 2004Abstract Physical–chemical surface character has been described as a determinant factor in adsorbing polyelectrolytes onto oxide surfaces. Since basically composed by hydroxyl groups, the acidity or basicity induced by the bulk lattice in such groups seems to be of great relevance in the adsorption process.
Ricardo H.R. Castro +2 more
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