MSc in Radio-physics

The kinetics of electrocrystallization of nanostructured gold is investigated and the physical proper-ties of nanostructured materials such as thermal stability, surface roughness and hardness are im-proved. A new stable non-toxic electrolyte for the electrodeposition of gold and gold alloys is pre-sented. Nanoscaling is achieved by pulse techniques. The possibility of controlling the crystallite size depending on physical and chemical process parameters such as pulse duration, current density, bath temperature, type and amount of additives is shown. A new general equation for the current tran-sient for three-dimensional nucleation and mixed ion transfer and diffusion controlled growth with previous adsorption process based on the existing theories is reported. The theoretical predictions of this equation and its relevance for the analysis of current-time transients are discussed and compared with experimental observations. The characterizations are made by means of in situ high-temperatur