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Characterization of a barium surface by AES, XPS and SIMS
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Orientador(es)
Resumo(s)
The surface of a solid barium sample has been studied by surface analysis techniques. The procedure to obtain a clean surface is discussed. In depth distribution of the sputtered ions during cleaning provides a good way to understand the evolution in the surface composition. Ion images show clear differences in the composition of the sputtered spot relatively to the adjacent area. The acquisition of XPS and AES spectra showed that the surface is clean according to usual guidelines. However, positive and negative SIMS spectra gave insight in the identification of the low level contaminants. About 12 compounds have been identified on the 'clean' barium surface.
Descrição
This work was supported by the Portuguese Foundation for Science and Technology through the project “Análise de Superfı́cies” Ref. 3/3.1/MMA/1764/95.
Palavras-chave
AES Barium SIMS XPS Instrumentation Condensed Matter Physics Surfaces, Coatings and Films