Nonstoichiometry on TiO{sub 2}(110) and Cu{endash}TiO{sub 2} interfaces

Journal Article · Fri May 01 04:00:00 EDT 1998 · Journal of Vacuum Science and Technology, A

DOI:https://doi.org/10.1116/1.581236· OSTI ID:342630

Wagner, M; Kienzle, O ^[1]; Bonnell, D A ^[2]; Ruehle, M ^[1]

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1. Max-Planck-Institut fuer Metallforschung, Seestrasse 92, D-70174, Stuttgart (Germany)
2. 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--
• Journal Information: Journal of Vacuum Science and Technology, A, Journal Name: Journal of Vacuum Science and Technology, A Journal Issue: 3 Vol. 16; ISSN 0734-2101; ISSN JVTAD6
• Country of Publication: United States
• Language: English

Related Subjects

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