Nanoisland formation of small Ag -clusters on HOPG as determined by inner-shell photoionisation spectroscopy
| Autor: | Wolfgang Eberhardt, S. Peters, M. Neeb, S. Peredkov, M. Al-Hada |
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| Rok vydání: | 2015 |
| Předmět: |
Binding energy
Analytical chemistry chemistry.chemical_element Surfaces and Interfaces Condensed Matter Physics Spectral line Surfaces Coatings and Films Auger Metal chemistry.chemical_compound Crystallography chemistry X-ray photoelectron spectroscopy visual_art Materials Chemistry visual_art.visual_art_medium Spectroscopy Carbon Silver oxide |
| Zdroj: | Surface Science. 639:43-47 |
| ISSN: | 0039-6028 |
| DOI: | 10.1016/j.susc.2015.03.016 |
| Popis: | XPS (3d) and Auger spectra (MNN) of deposited Ag n -clusters on a non-sputtered HOPG surface have been measured. Most of the XPS and Auger spectra appear very similar to the corresponding bulk spectrum, caused by a high mobility and agglomeration of the clusters on the inert carbon surface, independent of the initial cluster size. The metallic fingerprint of the cluster-agglomerated islands is sustained under UHV conditions for several days. Oxidised Ag-islands reveal a positive binding energy shift in distinct contrast to the negative XPS shift usually observed for silver oxide bulk compounds. The XPS binding energy shift has been used for estimation of the diameter of the cluster-assembled nanoislands (6–9 nm) using an electrostatic model. |
| Databáze: | OpenAIRE |
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