Modification of Silicon Surface with Silver, Gold and Palladium Nanostructures via Galvanic Substitution in DMSO and DMF Solutions

The investigation results of silver, palladium and gold nanoscale particles deposition on the silicon surface in the DMSO and DMF media are presented. The influence of organic aprotic solvents on the geometry of metal particles and their distribution on the substrate is described. It is shown that solutions of stable metal complexes ([Ag (CN)2] – , [AuCl4] – ) are the main factor in the formation of discrete nanoparticles with a small range of sizes and uniform distribution along the substrate surface, as well as nanostructured films.

Осадження біметалевих наночастинок pd-au за імпульсного режиму електролізу у dmso розчинах

The electrochemical co-deposition of palladium and gold on the glassy carbon surface from solutions of their salts in dimethylsulfoxide (DMSO) is studied. It is shown that the precipitate in the form of discrete sphere-like particles of 30...140nm, which are uniformly distributed on the substrate, is formed  at concentrations of 0.004M PdCl2 + (0.002...0.004)M HAuCl4 + 0.05M Bu4NClO4, E = -0.3...-1.5V, at pulse electrolysis.

Cadmium electrochemical reduction in CdCl2 solutions in dimethylsulfoxide and morphology of cathode deposit

Cadmium reduction in solutions at steady-state and pulse electrolysis has been studied. It was established that polarization results in cadmium formation at potentials 1 V larger than equilibrium one. In 0.25-1.0 molar solutions of CdCl2 concentrated depolarization leads to removement of the beginning of cadmium reduction by 0.3 V. Photographs of SEM are presented and effect of electrolysis characteristics on the morphology of cathode deposit is shown.