Synthesis of TiO2(110) ultra-thin films on W(100) and their reactions with H2O

J. Matharu (1) , Gregory Cabailh (2, 3) , G. Thornton (1)

1 INSP - Institut des Nanosciences de Paris
2 INSP-E9 - Oxydes en basses dimensions
3 London Centre for Nanotechnology and Chemistry Departmen

We present a study of the growth and reactivity of ultra-thin films of TiO2 grown on W(100). Three approaches to film growth are investigated, each resulting in films that show order in low-energy diffraction (LEED) and a low level of non-stoichiometry in X-ray photoelectron spectroscopy (XPS). H2O is used as a probe of the reactivity of the films, with changes in the Ti 2p and O 1s core levels being monitored by XPS. Evidence for the dissociation of H2O on the TiO2(110) ultra-thin film surface is adduced. These results are discussed with reference to related studies on native TiO2(110)

Mots clés: TiO2; Thin films; XPS; LEED; H2O

Domaines: Matière Condensée [cond-mat]

J. Matharu, Gregory Cabailh, G. Thornton. Synthesis of TiO2(110) ultra-thin films on W(100) and their reactions with H2O. Surface Science : A Journal Devoted to the Physics and Chemistry of Interfaces, 2013, 616, pp.198-205. ⟨10.1016/j.susc.2013.05.020⟩. ⟨hal-01229163⟩