کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5426187 | 1395881 | 2008 | 5 صفحه PDF | دانلود رایگان |
The changes of the core level binding energies as well as the shape of the valence band were correlated with morphological changes in the platinum submonolayer grown on a ruthenium substrate. Transformation of a relaxed (dendritic structure, as deposited at room temperature) to stressed (polymorphic, annealed) phase was detected at 873Â K from the Pt 4f binding energy shift of +71Â meV. Dissolution of Pt adatoms in the Ru(0Â 0Â 0Â 1) substrate (alloyed phase) took place at higher temperatures. Starting from 973Â K the binding energy of the Pt 4f shifts by +175Â meV relative to the relaxed adlayer. At the same time, the distance between high binding energy and surface contribution of the Ru 3d increases from â391 (clean) to â429Â meV upon alloying.
Journal: Surface Science - Volume 602, Issue 2, 15 January 2008, Pages 465-469