Properties of hybrid structures grown on the basis of (Ni-C) nanocomposite onto (0001) gase van der waals surface

Abstract

Morphology and chemical composition of metal (Ni), carbon, nanocomposite (Ni-C) and oxide (Ga,0₃) nanostructures grown onto van der Waals surface of a layered semiconductor (0001) GaSe were stu- died by atomic force microscopy, X-ray photoelectron spectroscopy and Raman spectroscopy. The structures were grown by the technique of vacuum deposition of nanoscale droplets of the material evaporated by electron beam from a liquid ion source under an electric field. Dense (lateral density > 10¹⁰см^-2) uniform arrays of carbon-encapsulated nickel nanoparticles (Ni@ C) with geometrical sizes of ~ 1 ...15  nm were grown onto atomically smooth substrate surface with molecular bonding type. We report on the processes of self-organization of Ni and Ni@ C nanoparticles arrays on van der Waals surface of the substrate during its oxidation under intensive optica! UV irradiation. In addition, we report on the processes of formation of carbon and nanocomposite (Ni-C) nanostructures on (0001) GaSe surfaces with a low concentration of dangling bonds (Se vacancies) and on oxidized Ga₂0/(0001) GaSe surfaces with a high concentration of oxygen vacancies.