Initial oxidation behavior of Ni 3 Al (210) surface induced by supersonic oxygen molecular beam at room temperature
| Autor: | Akitaka Yoshigoe, Yuden Teraoka, Toshiyuki Hirano, Ya Xu, Junya Sakurai, Masahiko Demura |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Photoemission spectroscopy Analytical chemistry General Physics and Astronomy chemistry.chemical_element Synchrotron radiation 02 engineering and technology Surfaces and Interfaces General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Oxygen Spectral line Surfaces Coatings and Films Nuclear magnetic resonance chemistry 0103 physical sciences Monolayer Irradiation 0210 nano-technology Saturation (chemistry) Molecular beam |
| Zdroj: | Applied Surface Science. 391:18-23 |
| ISSN: | 0169-4332 |
| Popis: | The initial oxidation behavior of a clean Ni 3 Al (210) surface was studied at 300 K using a supersonic O 2 molecular beam (O 2 SSMB) having an O 2 translational energy of 2.3 eV, and real-time photoemission spectroscopy performed with high-brilliance synchrotron radiation. The evolution behaviors of the O 1s, Ni 2p, Al 2p, and Ni 3p spectra were examined during irradiation with the O 2 SSMB. The spectral analysis revealed that both the Al atoms and the Ni atoms on the surface were oxidized; however, the oxidation of Al progressed much faster than that of Ni. The oxidation of Al began to occur and AlO x was formed at an oxygen coverage of 0.26 monolayer (ML) (1 ML was defined as the atomic density of the Ni 3 Al (210) surface) and saturated at an oxygen coverage of 2.5 ML. In contrast, the oxidation of Ni commenced a little late at an oxygen coverage of 1.6 ML and slowly progressed to saturation, which occurred at an oxygen coverage of 4.89 ML. |
| Databáze: | OpenAIRE |
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