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:

1972-11-01

Pagination or Media Count:

24.0

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 andor diffusion control predominate. In the second part, a methodology has been developed for following rapidly small changes of the ellipsometric parameters delta0 and Psi0 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