Alkali metal adsorption on Al(111)

J. N. Andersen, E. Lundgren, R. Nyholm, M. Qvarford

Research output: Contribution to journalArticlepeer-review

Abstract

The submonolayer adsorption of Na, K, Rb, and Cs on the Al(111) surface at 100 K and at room temperature is investigated by high resolution core level spectroscopy and low energy electron diffraction. It is found that the first alkali atoms on the surface adsorb at surface defects. At higher coverages, up to approximately one third of the maximum submonolayer coverage, alkali atoms adsorbed at defects coexist with a dispersed phase. At higher coverages island formation is found to occur for the majority of the systems. It is argued that all of the ordered structures formed at room temperature involve a disruption of the Al(111) surface in contrast to the situation at 100 K where the alkali atoms adsorb as adatoms.

Original languageEnglish
Pages (from-to)307-334
Number of pages28
JournalSurface Science
Volume289
Issue number3
DOIs
Publication statusPublished - 1993 Jun 1

Subject classification (UKÄ)

  • Atom and Molecular Physics and Optics

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