Orientation of oxygen ad-molecules on stepped platinum (112)
| Autor: | Sugio Wako, Manami Sano, Yuichi Ohno, Shin-ichiro Tanaka, Tatsuo Matsushima, Masao Kamada |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Extended X-ray absorption fine structure
Plane (geometry) Chemistry Resonance chemistry.chemical_element Surfaces and Interfaces Condensed Matter Physics Molecular physics XANES Surfaces Coatings and Films Crystallography Chemisorption Orientation (geometry) Materials Chemistry Perpendicular Platinum |
| Zdroj: | Surface Science. 461:L537-L542 |
| ISSN: | 0039-6028 |
| DOI: | 10.1016/s0039-6028(00)00614-2 |
| Popis: | The orientation of oxygen ad-molecules was examined on stepped Pt(112)=(s)[3(111)×(001)] at around 110 K by means of near-edge extended X-ray absorption fine-structure (NEXAFS). The π ∗ resonance was always major when the electric vector of the incident X-ray was in a plane perpendicular to the step edge. On the other hand, when the vector was in the plane parallel to it, the σ ∗ resonance was major at the normal incidence and was attenuated with increasing incidence angle of the X-ray whereas the π ∗ resonance was enhanced. It was concluded that oxygen was mostly oriented along the step edge. |
| Databáze: | OpenAIRE |
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