Electrochemical Preparation and Characterization of Nanostructured Ag-Bi Thin Films in Organic Baths

Abstract

We report on the preparation of nanostructured Ag-Bi alloy thin films by galvanostatic electrodeposition in organic baths, which also provides a very good way to prepare the nanostructured active metal alloy thin films. Control of the current densities and relative concentrations of the cations allowed the diameters of Ag-Bi nanocrystallites to be specified in the range of . The surface morphologies of the films electrodeposited in an organic dimethysulfoxide bath containing with a current density of were uniform in metallic luster, and the films were adhesive. The results of X-ray diffraction measurements indicated that the nanostructured Ag-Bi thin films were the mixture of silver-rich solid solution phase and pure bismuth phase. The optical absorptance spectra of the nanostructured Ag-Bi thin films were broader, and increased in magnitude and shifted toward lower energies for increasing Ag content in the Ag-Bi thin films. The resistivities of the films decreased with the thickness increasing.