Tuning the chemical functionality of a gas sensitive material: Water adsorption on SnO2(101)

M. Batzill, W. Bergermayer, I. Tanaka, U. Diebold

Department of Physics, Tulane University, New Orleans, Louisiana 70118, U.S.A.
Fukui Institute for Fundamental Chemistry, Kyoto University, Sakyo, Kyoto 606-8103, Japan
Department of Materials Science and Engineering, Kyoto University, Sakyo, Kyoto 606-8501, Japan

Surf. Sci. 600 (2006) 29-32

Photoemission and density functional theory studies show that water adsorbs dissociatively on the SnO2(101) surface in the presence of terminating oxygen atoms and molecularly if these surface oxygen atoms are removed. The different chemical surface responses of these two bulk terminations of SnO2 also change the water induced band bending and consequently the conductivity of the gas sensing material.

Reprints available from U. Diebold (diebold at iap_tuwien_ac_at).

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