Journal
SCIENCE
Volume 322, Issue 5901, Pages 570-573Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1165044
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Funding
- Grant-in-Aid for Scientific Research on Priority Areas Nano Materials Science for Atomic-scale Modification 474
- Ministry of Education, Culture, Sports and Technology.
- PRESTO, the Japan Science and Technology Agency
- Industrial Technology Research Grant Program
- New Energy and Industrial Technology Development Organization
- Japanese Society for the Promotion of Science fellow
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Determining the atomic structures of oxide surfaces is critical for understanding their physical and chemical properties but also challenging because the breaking of atomic bonds in the formation of the surface termination can involve complex reconstructions. We used advanced transmission electron microscopy to directly observe the atomic structure of reduced titania (TiO(2)) (110) surfaces from directions parallel to the surface. In our direct atomic-resolution images, reconstructed titanium atoms at the top surface layer are clearly imaged and are found to occupy the interstitial sites of the TiO(2) structure. Combining observations from two orthogonal directions, the three-dimensional positioning of the Ti interstitials is identified at atomic dimensions and allows a resolution of two previous models that differ in their oxygen stoichiometries.
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