TiO2 (110) experiment

M.Wagner# D.A.Bonnell* and M.Rühle#

#Max-Planck-Institut für Metallforschung,
Seestraße 92, D-70174 Stuttgart, Germany
*Dept. of Mat. Sci. & Eng., University of Pennsylvania, Philadelphia, PA 19104, USA.

A number of reconstructions have been observed on the (110) surface of TiO2 in the rutile modification that accommodate oxygen deficiency. We present atomically resolved STM images that describe a new reconstruction with (3×2) symmetry. A model for the observed reconstruction is discussed where this symmetry is achieved by removing 1/3 or 2/3 of the oxygen in the bridging oxygen rows such that a shift in position of missing oxygen by one lattice space vector along the [001] direction occurs in every third row. This structure contrasts those reported previously in which entire rows are modified or removed.