Nonstoichiometry on TiO{sub 2}(110) and Cu{endash}TiO{sub 2} interfaces
- Max-Planck-Institut fuer Metallforschung, Seestrasse 92, D-70174, Stuttgart (Germany)
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)
A number of reconstructions have been observed on the (110) surface of TiO{sub 2} in the rutile modification that accommodates oxygen deficiency. We present atomically resolved scanning tunneling microscope images that describe a new reconstruction with (3{times}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 second row. This structure contrasts those reported previously in which entire rows are modified or removed. Furthermore, nanometer-sized Cu islands on TiO{sub 2}(110) surfaces fabricated by vapor deposition onto TiO{sub 2} at 200{degree}C were studied by conventional and high-resolution transmission electron microscopy (TEM). Our TEM studies show that Cu forms faceted islands (40 nm in width) on the surface with the orientation relationship given by Cu{l_brace}110{r_brace}{parallel}TiO{sub 2}(110) and Cu{l_angle}001{r_angle}{parallel}TiO{sub 2}[1{bar 1}0]. The orientation relationship differs from that resulting from room temperature deposition onto stoichiometric surfaces. {copyright} {ital 1998 American Vacuum Society.}
- OSTI ID:
- 342630
- Report Number(s):
- CONF-971029-; ISSN 0734-2101; TRN: 9811M0030
- Journal Information:
- Journal of Vacuum Science and Technology, A, Vol. 16, Issue 3; Conference: 44. national symposium of the American Vacuum Society, San Jose, CA (United States), 20-24 Oct 1997; Other Information: PBD: May 1998
- Country of Publication:
- United States
- Language:
- English
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