THE CHEMISORPTION OF OXYGEN ON (100) LEAD SULFIDE

1 November 1968

journal article
Published by EDP Sciences in Le Journal de Physique Colloques

Vol. 29 (C4) , C4-43
https://doi.org/10.1051/jphyscol:1968406

Abstract

We have studied the chemisorption of oxygen on the cleavage surface of PbS by low-energy electron diffraction. Oxygen exposures up to 50 torr-hours resulted only in a slight reduction in the diffraction beam intensities, and it was concluded that the resulting oxygen coverage was no greater than fifteen percent of a monolayer. Work function changes measured in the diffraction tube revealed a slow change with oxygen adsorption, with a 36 torr-hour exposure producing a change of 0.3 eV. These results are in disagreement with the results expected on the basis of experiments with polycrystalline films and are pertinent to the interpretation of transport data obtained from single crystal thin films

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