Adsorption of Lanthanum on Tungsten Using Probe-Hole Field Emission Microscopy

This paper presents results mainly on the variation of the work function phi sub ad , with the coverage theta of La on W, on the (011), (111) and (112) planes and the (161) region using probe-holed field emission microscopy. On the (011) plane, initially, phi sub ad decreases monotonically with an i...

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Published inJournal of physics. D, Applied physics Vol. 24; no. 3; pp. 454 - 457
Main Authors Bhave, A S, Kanitkar, P L
Format Journal Article
LanguageEnglish
Published 14.03.1991
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Summary:This paper presents results mainly on the variation of the work function phi sub ad , with the coverage theta of La on W, on the (011), (111) and (112) planes and the (161) region using probe-holed field emission microscopy. On the (011) plane, initially, phi sub ad decreases monotonically with an increase in the coverage theta , and attains the minimum at approx theta = 1. On the other planes, phi sub ad increases initially, and then decreases. Attempts have been made to estimate the adsorbate--substrate dipole moment and the charge transfer between them on the (011) plane. The results are discussed in the light of the geometrical structure of the adsurface. Graphs. 20 ref.--AA
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0022-3727