Band structure of large-sized SiC nanocomposites

Photoinduced effects in TiO2 nanocrystalline films with different morphology

“…Few direct inter-band transitions with an energy higher than 3.8 eV are also predicted [15,16]. In such kind of nanocrystalline semiconductors the relatively flat bands possessing both properties of delocalized long-range ordered bands and localized states originating from the nanoconfinement effects begin to play a principal role [17]. Also, in the case of TiO 2 amorphous films, the ellipsometrically measured pseudodielectric function spectra have shown three distinct structures at about 3.3, 3.9 and 4.9 eV, which have been assigned to the transitions at the principal van Howe points in the Brillouin zone.…”

Effect of Biofield Treatment on Structural and Morphological Properties of Silicon Carbide

“…Thus, it is hypothesized that high energy milling through biofield treatment may induce the movement of crystallite boundaries that results into large crystallite size. Kityk et al reported that crystallite size and band gap are inversely proportional to each other [29]. Thus, it is speculated that the change in crystallite size through biofield treatment may led to alter the band gap in SiC powder.…”

Laser operated optical features in β-BaTeMo2O9:Cr3+ nanocrystallites

“…The energy cut-off and the PerdeweAlder screening potential coefficients [17] were converged within the values equal to about 0.15 eV. At the beginning we performed the total energy minimization applying a LDA pseudopotential approach [20]. We established that this approach was not sufficient for the total energy optimisation of particular clusters [21,22].…”