Characterization of WO3:Ag films: ToF-SIMS studies of ammonia adsorption

C. Bittencourt, M.P. Felicissimo, A. Felten, L.A.O. Nunes, P. Ivanov, E. Llobet, J.-J. Pireaux, L. Houssiau

Research output: Contribution to journalArticle

Abstract

In this work, the composition and morphology of WO 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 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 binds preferentially at the surface of the Ag clusters. No preferential binding site was found for hydrocarbon contamination.
Original languageEnglish
Pages (from-to)21-28
Number of pages8
JournalApplied Surface Science
Volume250
Issue number1-4
DOIs
Publication statusPublished - 31 Aug 2005

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Secondary ion mass spectrometry
Ammonia
Adsorption
Screen printing
Bronze
Binding sites
Hydrocarbons
Raman spectroscopy
Contamination
X ray photoelectron spectroscopy
Binding Sites
Annealing
Transmission electron microscopy
Atoms
Substrates
Air
Chemical analysis

Cite this

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title = "Characterization of WO3:Ag films: ToF-SIMS studies of ammonia adsorption",
abstract = "In this work, the composition and morphology of WO 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 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 binds preferentially at the surface of the Ag clusters. No preferential binding site was found for hydrocarbon contamination.",
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Characterization of WO3:Ag films : ToF-SIMS studies of ammonia adsorption. / Bittencourt, C.; Felicissimo, M.P.; Felten, A.; Nunes, L.A.O.; Ivanov, P.; Llobet, E.; Pireaux, J.-J.; Houssiau, L.

In: Applied Surface Science, Vol. 250, No. 1-4, 31.08.2005, p. 21-28.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Characterization of WO3:Ag films

T2 - ToF-SIMS studies of ammonia adsorption

AU - Bittencourt, C.

AU - Felicissimo, M.P.

AU - Felten, A.

AU - Nunes, L.A.O.

AU - Ivanov, P.

AU - Llobet, E.

AU - Pireaux, J.-J.

AU - Houssiau, L.

PY - 2005/8/31

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