Defects and Pd growth on the reduced SnO2(100) surface

K. Katsiev, M. Batzill, L.A. Boatner, U. Diebold

Department of Physics, Tulane University, New Orleans, Louisiana 70118, U.S.A.
Department of Physics, University of South Florida, Tampa, FL 33620, U.S.A.
Oak Ridge National Laboratory, Oak Ridge, TN 37831, U.S.A.

Surf. Sci. 602 (2008) 1699-1704

Scanning tunneling microscopy experiments on a clean, reduced SnO2(100)-(1 × 1) surface reveal surface defects with zero-, one-, and two-dimensions. Point defects consist of missing SnO/SnO2 units. Line defects are probably crystallographic shear planes that extend to the surface and manifest themselves as rows of atoms, shifted half a unit cell along the [010] direction. Their ends act as preferential nucleation sites for the formation of Pd clusters upon vapor deposition. Areas of a more reduced surface phase, still with a (1 × 1) structure and a half-unit cell deep, form at [001]-oriented step edges.

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

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