the electronic structure, energy band structure and electronic density of 2 sno ceramic in cubicphase have been investigated using first principle full potential-linearized augmented plane wave (fp-lapw)method within density functional theory (dft). local density approximation (lda) and the generalizedgradient approximation (gga), which are based on exchange- correlation energy optimization wer...

nanostructures have considerably higher surface areas than their bulk counterparts; thereforesurfaces often play important, sometimes even dominant, roles in the nanostructure properties. thenanocrystalline and nanotubes have low band gaps and high carrier mobility, thus offeringappealing potential as absorption gas. interaction between methanol molecules and carbonnanotube is investigated usin...

A series of p- and n-GaAs-S-C(n)H(2n+1) || Hg junctions are prepared, and the electronic transport through them is measured. From current-voltage measurements, we find that, for n-GaAs, transport occurs by both thermionic emission and tunneling, with the former dominating at low forward bias and the latter dominating at higher forward bias. For p-GaAs, tunneling dominates at all bias voltages. ...

The K band galaxy luminosity functions of three massive high redshift clusters of galaxies. ABSTRACT K band observations of the galaxy populations of three high redshift (z = 0.8–1.0), X-ray selected, massive clusters are presented. The observations reach a depth of K ≃ 21.5, corresponding to K * + 3.5 mag. The evolution of the galaxy properties are discussed in terms of their K band luminosity...

Waves in periodic media undergo multiple scattering and interference. As a result, their frequency spectrum is divided into bands in which waves pass freely, and gaps in which waves cannot propagate. This band diagram depends on the physical and geometrical properties of the periodic cell, through a dispersion relation. Using a new representation of the dispersion relation of laminates, we show...

The structure and the electronic properties of single-walled zigzag BN and B3C2N3 nanotubes (n, 0; n=4–10) were investigated using first-principles calculations based on a density functional theory. A plane–wave basis set with periodic boundary conditions in conjunction with Vanderbilt ultrasoft pseudo-potential was employed. The energy gap of ZB3C<su...

From the Research Institute for Bioresources and Biotechnology, Ishikawa Prefectural University, Nonoichi, Ishikawa 921-8836, the Department of Biotechnology, The University of Tokyo, Bunkyoku, Tokyo 113-8657, the Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto 6068502, the National Food Research Institute, National Agriculture and Food Research Organization, Tsukuba, Ibaraki 3...