Accession Number : AD0752836

Title :   Optical Studies of Electrode Solution Interfaces. Part I - Complex Plane Analysis in Electrode Modulated Specular Reflectance Studies. Part II - Modulation Ellipsometry and Its Application to the Study of the Electrode-Electrolyte Interface.

Descriptive Note : Technical rept.,

Corporate Author : CASE WESTERN RESERVE UNIV CLEVELAND OHIO ELECTROCHEMISTRY RESEARCH LAB

Personal Author(s) : Adzic,R. ; Cahan,B. D. ; Yeager,E. ; Horkans,J.

Report Date : 01 NOV 1972

Pagination or Media Count : 24

Abstract : The report is divided into two sections. In the first, electrochemically modulated optical specular reflectivity was studied by complex plane analysis to obtain kinetic information about adsorption-desorption processes. Measurements of the underpotential deposition of lead on gold resolved the potential and frequency domains where kinetic and/or diffusion control predominate. In the second part, a methodology has been developed for following rapidly small changes of the ellipsometric parameters delta(0) and Psi(0) and of the reflectivity necessary for the unique determination of (n bar) = n - ik and thickness of a surface film. Examples are given of the application of this technique to the electrochemical interface of Pt and Au electrodes. (Author)

Descriptors :   (*ELECTRODES, *ELECTROCHEMISTRY), (*ADSORPTION, ELECTRODES), (*ELECTROPLATING, ELECTROCHEMISTRY), REFLECTIVITY, DEPOSITION, DIFFUSION, LEAD(METAL), GOLD, SURFACES, PLATINUM

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE