Photoemission study of oxygen adsorption on Rb6C60 film surface
| Autor: | Mingming Ma, M Bai, Jie Wu, J.S. Zhu, M.R. Ji, Xing Liu |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Inorganic chemistry
Analytical chemistry General Physics and Astronomy chemistry.chemical_element Surfaces and Interfaces General Chemistry Condensed Matter Physics Alkali metal Peroxide Oxygen Surfaces Coatings and Films Rubidium chemistry.chemical_compound Adsorption X-ray photoelectron spectroscopy chemistry Rubidium carbonate Ultraviolet photoelectron spectroscopy |
| Zdroj: | Applied Surface Science. 153:150-155 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/s0169-4332(99)00351-7 |
| Popis: | X-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS) have been used to investigate oxygen adsorption on the surface of Rb 6 C 60 film at room temperature. The results show that the Rb 6 C 60 surface is sensitive to oxygen adsorption. The absorbed oxygen changes the crystal structure of the film by pulling intercalated Rb atoms to the surface, forming Rb oxides. An initial rapid oxygen uptake is mainly related to the formation of rubidium peroxide (Rb 2 O 2 ). There exists a strong reaction between C 60 and Rb 2 O 2 , leading to the formation of rubidium carbonate (Rb 2 CO 3 ). At high oxygen exposures, a slow further adsorption of oxygen is associated with the intensity increases of both Rb 2 CO 3 and rubidium superoxide (RbO 2 ) species. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect