A Capacitance Technique for the Study of Gas Molecule-Surface Interactions.
Abstract
The report discusses the development of a new technique for the study of gas molecule-surface interactions based on the capacitance change that occurs in a closely spaced parallel plate capacitor when gas molecules are absorbed on its plates. When the dielectric constant of the film absorbed in the capacitor is plotted as a function of pressure, a sharp bend in the curve appears at the formation of a monolayer. The dielectric constant on the monolayer is found to be considerably larger than would be expected on the basis of the free-molecule polarizability of nitrogen This enhancement of the polarizability has been attributed to the image dipole produced when a polarized molecule is close to a conducting surface. (Modified author abstract)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 07, 1973
- Accession Number
- AD0771429
Entities
People
- William D. Mccormick
Organizations
- University of Texas at Austin