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Ab initio studies of adsorption and migration surface processes on an alpha-Al2O3 surface
Rhein Westfal TH Aachen.
Rhein Westfal TH Aachen.
Uppsala University.
2005 (English)In: Solid State Communications, ISSN 0038-1098, E-ISSN 1879-2766, Vol. 135, no 01-Feb, 90-94 p.Article in journal (Refereed) Published
Abstract [en]

Surface processes on alpha-Al2O3 (0001) have been investigated theoretically using density functional theory. Ion-surface interactions prior to collision were investigated by means of ab initio molecular dynamics simulations, showing an adsorbate trajectory towards a preferred adsorption site. Furthermore, the adsorption process at different surface sites was investigated, together with calculations of barriers for migration between these sites. Although the equilibrium (bulk) adsorption site was energetically favourable, the presence and magnitude of the migration barriers indicate that activation energy is necessary to form the equilibrium surface structure. These results are of importance for a fundamental understanding of ion-surface interactions.

Place, publisher, year, edition, pages
Elsevier Science B.V., Amsterdam. , 2005. Vol. 135, no 01-Feb, 90-94 p.
Keyword [en]
alumina; adsorption; migration
National Category
Medical and Health Sciences
URN: urn:nbn:se:liu:diva-59678DOI: 10.1016/j.ssc.2005.03.048ISI: 000229996300020OAI: diva2:353088
Available from: 2010-09-23 Created: 2010-09-23 Last updated: 2010-09-23

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Rosen, Johanna
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