Stark Splitting of the Energy Spectrum in a Two-Electron Quantum Dot

A two-electron quantum dot model assuming the existence of the image charge is formulated in the present paper. Based on this model, the effective electron confinement potential is calculated by the self-consistent method. It is established that the electron confinement potential in the quantum dot has both symmetric and antisymmetric parts. An analysis of this potential demonstrates that the tunnel electron transition in the quantum dot can occur only in the direction perpendicular to the film plane. __________ Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 5, pp. 9–20, May, 2005.     

Synthesis of Heterogeneous ZnO/Co3O4 Nanostructures by Chemical Deposition from Solutions

Technical Physics - Nanocrystalline cobalt oxide Co3O4 and composite ZnO/Co3O4 are obtained by chemical deposition from solutions followed by thermal annealing. It is shown that the presence of...     

Fabrication of nanostructured silicon surface using selective chemical etching

A two-stage process based on selective chemical etching induced by metal nanoclusters is used to fabricate nanostructured surfaces of silicon plates with a relatively low reflectance. At silicon surfaces covered with silver nanoclusters, the SERS effect is observed for rhodamine concentrations of about 10^–12 M. At certain technological parameters, the depth of the nanostructured layer weakly depends on the conditions for the two-stage etching, in particular, etching time. Under otherwise equal conditions for etching, the rate of the formation of textured layer in the p-type silicon is two times greater than the formation rate in the n-type silicon.     

Preparation of Nanosized Tungsten and Tungsten Oxide Powders

Physics of the Solid State - Nanopowder tungsten oxide and metallic tungsten are obtained via pyrolysis of ammonium metatungstate. Two methods are used for the synthesis of tungsten oxide: the use...