Growth of iron oxides on Ag(111) — Reversible Fe2O3/Fe3O4 transformation
| Autor: | Alexander M. Gigler, Christoph Schlueter, Maike Lübbe, Wolfgang Moritz |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Materials science
Oxide Iron oxide Surfaces and Interfaces Hematite engineering.material Condensed Matter Physics Epitaxy Surfaces Coatings and Films chemistry.chemical_compound Crystallography symbols.namesake chemistry Chemical engineering visual_art Materials Chemistry visual_art.visual_art_medium symbols engineering Wüstite Thin film Raman spectroscopy Magnetite |
| Zdroj: | Surface Science. 605:1986-1993 |
| ISSN: | 0039-6028 |
| Popis: | Iron oxide thin films were grown by multiple cycles of iron deposition and oxidation at different annealing temperatures. The oxide layers were characterized in-situ by X-ray diffraction and LEED and after the preparation ex-situ by confocal Raman microscopy. The results show that well ordered films of wustite, magnetite, and hematite can be grown on Ag(111). Wustite was observed at the initial stages of growth for films of ~ 10 A thickness prior to magnetite formation. Magnetite films of several unit cells thickness were grown and studied by XRD and Raman spectroscopy. The magnetite films could be oxidized to epitaxial hematite films at low oxygen pressures. For our films, transformation from magnetite to hematite is reversible by annealing in UHV. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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