Accession Number : AD0608520

Title :   Study of Adsorption of Gases on Solids in the High Vacuum Range,

Descriptive Note : Scientific rept. no. 8,

Corporate Author : GENERAL TELEPHONE AND ELECTRONICS LABS INC BAYSIDE N Y

Personal Author(s) : Florio,J. V. ; Baird,D. H.

Report Date : 30 SEP 1964

Pagination or Media Count : 26

Abstract : The work function of polycrystalline tungsten was measured, using the retarding field technique, as a func tion of the exposure to a carbon monoxide ambient. The work function was found to vary from 4.4 eV to 5.2 eV in going from an initially clean surface to one saturated with carbon monoxide. The successive adsorption of oxygen on a tungsten surface already saturated with carbon monoxide is inferred from the work-function data. The increase in work function (from 5.2 eV to 6.4 eV) is indicative of possibly a monolayer or more of adsorbed oxygen. The work functions for a clean (111) silicon surface, silicon exposed to 0.000003 torr-sec oxygen, and silicon exposed to 0.000009 torr-sec oxygen were found by the retarding field method to be 4.79 eV, 5.02 eV and 5.07 eV, respectively. (Author)

Descriptors :   (*TUNGSTEN, WORK FUNCTIONS), (*SILICON, WORK FUNCTIONS), VACUUM, CARBON COMPOUNDS, MONOXIDES, OXYGEN, ADSORPTION, SINGLE CRYSTALS, FILAMENTS, SURFACE PROPERTIES

Distribution Statement : APPROVED FOR PUBLIC RELEASE