AES study of electron beam induced damage on TiO2 surfaces

https://doi.org/10.1016/0169-4332(95)00603-6Get rights and content

Abstract

The damage induced by an electron beam on several TiO2 surfaces has been studied with Auger Electron Spectroscopy. We studied single crystal specimens of TiO2 (rutile) of the (100) and (110) orientation as well as pressed powder specimens consisting of rutile and a 65%–35% mixture of anatase and rutile. All surfaces acquired a (sometimes extremely high) negative charge upon electron irradiation. All surfaces did loose a significant amount of oxygen due to electron stimulated desorption. In the presence of background oxygen this process did not occur. Carbon (graphite) was deposited on the samples from residual gases. This is due to the decomposition of adsorbed carbonaceous species on the damaged surface and to the decomposition of positive gas phase ions on the negatively charged (irradiated) region of the surface. Significantly less carbon was deposited on the powder samples as compared to the single crystals. Carbon deposition is inhibited by the presence of oxygen in gas phase.

References (18)

  • W. Göpel et al.

    Surf. Sci.

    (1984)
  • S. Eriksen et al.

    Surf. Sci.

    (1987)
  • M.R. McCartney et al.

    Surf. Sci.

    (1991)
  • M.R. McCartney et al.

    Surf. Sci.

    (1989)
  • T. Bredow et al.

    Surf. Sci.

    (1995)
  • R. Heise et al.

    Surf. Sci.

    (1995)
  • J.T. Mayer et al.

    J. Electron Spectrosc. Rel. Phen.

    (1995)
  • J.P.S. Badyal
  • H. Idriss et al.

    Catal. Lett.

    (1994)
There are more references available in the full text version of this article.

Cited by (16)

  • Reduction effects in rutile induced by neutron irradiation

    2002, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
  • Electron-induced surface chemistry on TiN in ultrahigh vacuum

    2002, Applied Surface Science
    Citation Excerpt :

    Whether or not carbon will react with the host surface depends on, in particular, the host-surface chemistry and gas phase ambient or vacuum conditions. For TiO2, there was no carbon deposition in an ambient of 10−6 mbar of oxygen, and even initial carbon deposition could be removed by exposing the surface to 10−6 mbar of oxygen [4]. As is seen here, carbon deposition occurred on TiN by electron irradiation with much lower current densities.

View all citing articles on Scopus
View full text