The structure ofAl(111)-K−(√3 × √3)R30° determined by LEED: stable and metastable adsorption sites

Stampfl, Catherine; Burchhardt, J.; Nielsen, Morten; Adams, David L.; Scheffler, Matthias; Over, Herbert und Moritz, Wolfgang (1993): The structure ofAl(111)-K−(√3 × √3)R30° determined by LEED: stable and metastable adsorption sites. In: Surface Science, Bd. 287-28, Nr. 1: S. 418-422

Abstract

It is found that the adsorption of potassium on Al(111) at 90 K and at 300 K both result in a (√3 × √3)R0° structure. Through a detailed LEED analysis it is revealed that at 300 K the adatoms occupy substitutional sites and at 90 K the adatoms occupy on-top sites; both geometries have hitherto been considered as very unusual. The relationship between bond length and coordination is discussed with respect to the present results, and with respect to other quantitative studies of alkali-metal/metal adsorption systems.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Geowissenschaften > Department für Geo- und Umweltwissenschaften > Kristallographie und Materialwissenschaft
• Themengebiete: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie
• Sprache: Englisch