| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9566836 | Applied Surface Science | 2005 | 8 Pages |
Abstract
In this work, the composition and morphology of WO3 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 AgWO3 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 NH3 binds preferentially at the surface of the Ag clusters. No preferential binding site was found for hydrocarbon contamination.
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Authors
C. Bittencourt, M.P. Felicissimo, A. Felten, L.A.O. Nunes, P. Ivanov, E. Llobet, J.-J. Pireaux, L. Houssiau,