Characterization of WO3:Ag films
| Autor: | Luiz Antônio de Oliveira Nunes, Eduard Llobet, P. Ivanov, Laurent Houssiau, Marcella P. Felicissimo, J.J. Pireaux, Carla Bittencourt, Alexandre Felten |
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| Jazyk: | angličtina |
| Rok vydání: | 2005 |
| Předmět: |
Materials science
Annealing (metallurgy) Analytical chemistry General Physics and Astronomy Surfaces and Interfaces General Chemistry Condensed Matter Physics Micrography Grain size Surfaces Coatings and Films symbols.namesake Adsorption X-ray photoelectron spectroscopy Transmission electron microscopy symbols Thin film Raman spectroscopy |
| Zdroj: | Applied Surface Science. 250(1-4):21-28 |
| ISSN: | 0169-4332 |
| Popis: | In this work, the composition and morphology of WO 3 films loaded with different levels of Ag, prepared by screen-printing onto Si substrates and annealed in air were investigated. The TEM micrography showed that the films are grain-like; the grain size increases with the increase of the Ag loading level. The Raman spectroscopy showed the formation of a AgWO 3 bronze structure. XPS and ToF-SIMS results showed that while undergoing annealing, the Ag atoms migrate to the surface forming clusters. The molecular images obtained by ToF-SIMS showed that the NH 3 binds preferentially at the surface of the Ag clusters. No preferential binding site was found for hydrocarbon contamination. |
| Databáze: | OpenAIRE |
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