The growth of Au/Pd/alumina/Cu–Al system studied by SRPES
| Autor: | Tomáš Skála, Karel Mašek, Slavomír Nemšák, M. Cabala, M. Škoda, J. Libra, Vladimír Matolín |
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| Rok vydání: | 2008 |
| Předmět: |
Low-energy electron diffraction
Chemistry Alloy Oxide Analytical chemistry General Physics and Astronomy Surfaces and Interfaces General Chemistry engineering.material Condensed Matter Physics Surfaces Coatings and Films chemistry.chemical_compound X-ray photoelectron spectroscopy Transition metal Aluminium oxide engineering Thin film Layer (electronics) |
| Zdroj: | Applied Surface Science. 254:4340-4345 |
| ISSN: | 0169-4332 |
| Popis: | An ultra-thin alumina layer grown on Cu–9at.%Al (1 1 1) surface was studied using synchrotron radiation photoelectron spectroscopy (SRPES), X-ray photoelectron spectroscopy (XPS) and low energy electron diffraction (LEED). By deconvolving SRPES spectra of the Al 2p doublet, four components belonging to metallic as well as oxide phases were recognized. Pd–Au alloy formation was confirmed by SRPES measurement during Pd and Au deposition. The study of the system's thermal stability reveals diffusion of Pd and Au atoms through the alumina layer. While Au atoms start to diffuse under the alumina layer at 670 K, Pd atoms are forming Pd–Al surface alloy at this temperature. The diffusion of Pd atoms through alumina occurs when sample was heated over 770 K. Alumina layer was stable even after heating the sample at 870 K, but its structure was corrupted probably due to the diffusion of metal atoms. |
| Databáze: | OpenAIRE |
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