The structure of the quasihexagonal close packed (4x4) Na layer on Al(111): A SEXAFS study

A. Schmalz, S. Aminpirooz, J. Haase, D.R. Batchelor, Martin Meedom Nielsen, E. Bøgh, D.L. Adams

Research output: Contribution to journalLetterpeer-review

Abstract

The Al(111)-(4x4)-Na structure formed by adsorption of Na on Al(111) at low temperature is studied by surface extended X-ray absorption fine structure (SEXAFS). Analysis of the SEXAFS measurements shows that the adsorbed layer is quasihexagonal close-packed and slightly compressed, with a nearest-neighbour Na-Na bond length of 3.70+/-0.03 Angstrom. Na atoms are adsorbed in 3 different adsorption sites with roughly equal Na-Al bond lengths of 2.8 Angstrom but different perpendicular distances from the surface. Thus the Na layer is not strictly planar.
Original languageEnglish
JournalSurface Science
Volume301
Issue number1-3
Pages (from-to)L211-L216
ISSN0039-6028
DOIs
Publication statusPublished - 1994
Externally publishedYes

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