Kornyushchenko A. Structure formation and physical properties of nearequilibrium metal, oxide and multicomponent condensates with nanoscale elements

The dissertation is devoted to the investigation of the processes of phase and structure formation of near-equilibrium condensates of individual metals (Zn, Ni, Cu, Cr and Al), oxides (ZnO, NiO and CuO), fractal-percolation nanosystems (ZnO, ZnO/NiO and ZnO/CuO), as well as a multi-element systems composed of various metals (W, Ta, Hf, Ti, Mo, Cr, Zr, Al, Co and Ni) and carbon. The main result of the work is investigation of selective processes transformation at the phase formation and the condensates spatially distributed growth under vapor deposition conditions close to thermodynamic equilibrium in plasma-condensate and chemically active medium-condensate system in one component systems and during the transition from one-component to multicomponent systems. Mathematical model has been developed, that allows to estimate changes in the relative supersaturation of the depositing vapours in the range from 0.06 to 0.1 depending on the size of the zones of adatoms diffusion capture around Cu nanocrystals. With aim to compare the possibilities of the structure formation of nearequilibrium nanosystems using PVD and CVD technology, the technology of obtaining copper nanosystems based on the decomposition of CuCl2 in the presence of hydrogen and nitrogen have been proposed. It has been proved experimentally, that the dominant influence onto the nanosystems structure formation process plays ultralow relative saturation of the deposited vapour rather than the type of active medium above the growth surface.