Local geometrical structure of a Na
atop bonding due to chemical heterogeneity
مقال من تأليف: Scragg, G. ; Ettema, A. R. H. F. ; Woodruff, D. P. ; Cowie, B. C. C. ; Daimellah, A. ; Turton, S. ; Jones, Robert G. ; Kerkar, Moussa ;
ملخص: Normal incidence X-ray standing wavefield absorption (NIXSW) including site triangulation, has been used to study the local geometry of O and Na when O chemisorbs onto the Al(111)([radical sign]3 x [radical sign]3)R30[deg]-Na surface alloy phase. The favoured geometry places O atop the surface Na atoms, a result which has no parallel on elemental surfaces and which must be attributed to the chemical and electronic heterogeneity of the surface alloy. This structure rationalises earlier implications of local Na---O bonding from core level photoelectron spectroscopy.
لغة:
إنجليزية