COLL 273 |
| Taketoshi Minato1, Yasuyuki Sainoo2, Yousoo Kim2, Tomofumi Susaki2, Susumu Shiraki2, Hiroyuki S. Kato2, Maki Kawai2, and Ken-ichi Aika1. (1) Department of Environmental Chemistry and Engineering, Tokyo Institute of Technology, Interdisciplinary Graduate School of Science and Engineering, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8502, Japan, (2) RIKEN (The Institute of Physical and Chemical Research), Hirosawa, Wako, Saitama, 351-0198, Japan |
| Local electronic states of TiO2(110) have been investigated by Scanning Tunneling Microscopy (STM) and Scanning Tunneling Spectroscopy (STS) at low temperature in order to clarify spatial distribution of Ti 3d electrons on the surface. Since the energy of the Ti 3d electrons on the TiO2(110) are located around 1.0 eV below fermi level, STM measurements around -1.0 eV (sample bias voltage) allow us to image the spatial distributions of the Ti 3d electrons. The STM measurements for the TiO2(110) by -1.1 eV showed bright spots on the 5-fold coordinated Ti and dark spots on the oxygen vacancies and 6-fold coordinated Ti. It means that the Ti 3d electrons are located at only the 5-fold coordinated Ti. STS results also support these STM results. From these results of investigations, a new model for the spatial distributions of the Ti 3d electrons is shown. |
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Vibrational Analyses of Dry and Wet Surfaces
6:00 PM-8:00 PM, Monday, March 29, 2004 Disneyland -- North Exhibit Hall, Poster
Division of Colloid and Surface Chemistry |