Chemisorption Surface Titration and Surface Reconstruction of Alloys

1 March 1972

journal article
Published by American Vacuum Society in Journal of Vacuum Science and Technology

Vol. 9 (2) , 828-829
https://doi.org/10.1116/1.1317795

Abstract

Field ion microscopy revealed that chemisorption of CO and N2 on W induces surface reconstruction even at 78 K. Photoelectron emission from Ru films shows that CO wipes out memory of presintering: films of different initial work function yield equal final work function. Several alloy films equilibrated below 300 °C possess concentration gradients between surface and interior. By chemisorbing H2 or CO on CuNi, AgPd or AuPt the atoms of the VIIIb elements are counted. For RuPt the characteristic work function increase due to CO permits an estimation of the Ru content of the surface. CO adsorption on AuPt and AgPd causes drastic surface reconstruction, the surfaces becoming enriched with the element forming the stronger bonds with CO.

Keywords

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