Gorshkov Vyacheslav N.

The work aims to create, experimental and theoretical study of nanostructured functional materials based on Si, Ge, C and ZnO in order to determine their fundamental properties for further use of these materials in optical and sensor electronics, in particular as electrically active elements, thin functional layers, light-emitting materials in optoelectronic devices, means of visualization, light indication and gas sensors and subwavelength optical micromechanical devices.

Luminophores of “white light” are an important part of white-light-emitting diodes, and the main part of these diodes consists from UV light sources (usually an InGaN based light-emitting structure) and a luminophor transforming UV into a broad spectrum of white light. To date, rare earth or heavy metals are the main components of luminophors leading to its recycling complexity and increase in manufacturing costs. Moreover, the spectral characteristics of the modern commercial luminophors do not correspond to the spectral characteristics of the sunlight.

Technological methods and new nanocomposites made from semiconducting silicon-organic polymer poly(di-n-hexylsilane) PDHS and poly(methylphenylsilane) PMPS incorporated into nanoporous silicas with different pore diameter and geometry are developed. Controlled increase in silica pore diameter from 2.8 nm to 10 nm allows to investigate for the first time optical properties of polymers during transition from isolated polymer chain to polymer film and to establish possibilities of controlling this process.

Methods for morphology control in a process of nanostructures growth by deposition of atoms diffusing from solution to the forming surface are developed. Surface restructuring is considered, yielding morphologies of interest in catalysis. Shape selection for nanoparticles and surface nanostructures occurs in appropriate "nonequilibrium" regime of properly balanced rates of various processes.

Scientific interest in noble metals nanoparticles (NPs) and nanostructured metal surfaces formed by their deposition is caused by their unique physical properties, including surface enhancement of linear and nonlinear optical phenomena in the media in contact with such nanostructures. Morphological characteristics of NPs determine their catalytic, sensor, optical properties. Thus, it is of great importance to identify factors that affect the morphology of nanoparticles formed in multicomponent solution with regard to kinetic phenomena in solution and on the NPs surface.