Structure and Properties of Nanostructured Systems AgAu/Si

In aqueous solutions, a nanostructured AgAu bimetallic system is deposited by galvanic replacement on silicon. It was established that the coprecipitation of metals during galvanic replacement occurs somewhat ahead of the gold content in the AgAu/Si system. Thus, in aqueous solutions of [2mМАgNO₃]:[10mМHAuCl₄], nanoparticles with a ratio of Ag:Au = 2:10 are deposited on the silicon surface, respectively. The size of discrete bimetallic nanoparticles increases with increasing [AgNO₃]:[HAuCl₄] ratio. Therefore, at a close metal content, AgAu particles are the smallest. This is due to the factor of mutual influence of two metals during coprecipitation.