Study of Oxide Interlayers Formed Reactively at a Silver-Electrolyte Boundary

摘要

The differential reflectance of reactively oxidized versus unoxidized silver foils in aqueous potassium hydroxide was measured in the 1.5 to 5 eV energy range. From these results the imaginary part of the dielectric constant of the oxide can be determined directly in the free-electron region of silver, and the zero-frequency interband contribution to the dielectric function of the oxide-covered metal can be estimated. The scattering contribution to the reflectance from the oxide surface nonuniformities is discussed. 3 figures. (ERA citation 03:050686)