Skyba M. Plasma-chemical obtaining of functional mono- and bimetallic nanosystems of silver and gold

The thesis is devoted to solving the current scientific and technical problem of creating physicochemical bases and technologies for unified plasma-chemical production of nanosystems of metals (Ag, Au) with the different structural organizations: dispersions of monometallic nanoparticles (Ag, Au), dispersions of bimetallic nanoparticles with "alloy" and "core-shell" type, composites (nanostructures of MexOy=TiO2/Ме=Ag-AuNP) with a controlled level of functional properties (in particular, antimicrobial, (photo) catalytic, antioxidant, optical activity, etc.), principles of their regulation and forecasting. It has been proven that under the action of an anode-type plasma superfluid discharge on the processed systems “[Me+ (Ag+ or Au3+)]:[(STAB)], [Ag+/Au3+]:[STAB], [NPcore/Me+shell]:[STAB]”, “(Ме+)+ STAB)/TiO2”, nanosystems of the following composition are formed: monometallic Ag, Au nanoparticles, bimetallic nanoparticles of the "alloy" and "core-shell" type, a nanocomposite with the composition MexOy=TiO2/Ag,AuNP, respectively. It has been proven that the list and significance of the parameters that determine the physicochemical characteristics of nanosystems during plasma chemical synthesis depends on their composition and the type of stabilizer. It has been demonstrated that the obtained nanosystems exhibit the following functional properties – antibacterial, catalytic, antioxidant, optical, etc. The relationship between the properties and composition, structure, and physicochemical characteristics of the obtained metals nanosystems was determined. The dependence of the properties of nanosystems on their physical and chemical characteristics and composition has been scientifically substantiated and experimentally confirmed. The basic technological schemes, the technology of obtaining mono- and bimetallic nanosystems, composites using the plasma-chemical method of synthesis have been developed and implemented. Technical documentation has been developed.