Photoresponse of Titanium Dioxide Surface on Atomic Scale: Site for Visible Light Absorption

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概要

• 論文の詳細を見る

• The local photoresponse of a rutile TiO2(110) surface was visualized on the atomic scale by scanning tunneling microscopy (STM). Almost all the areas on the (110) surface responded to the illumination of 325 nm ultraviolet (UV) light, in accordance with the minimum bulk band-gap (3.2 eV) electron transition, with steps and ($1\times 2$) ridge areas exhibiting higher response intensities. When the same surface was illuminated with blue light at 442 nm, which is well below the minimum bulk band-gap transition energy, most of the surface areas were dormant, but certain areas at step regions and ($1\times 2$) ridge structures responded to the blue light. These sites are associated with oxygen deficiency on the surface, which may give a clue to the possibility of the surface engineering of a titania photocatalyst to be employed under visible light.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2004-07-15

著者

• Komiyama Masaharu

  Graduate School Of Medicine And Engineering Yamanashi University

• Li Yan-Jun

  Graduate School of Medicine and Engineering, Yamanashi University, Takeda, Kofu 400-8511, Japan

関連論文

• Cobalt Chemical Vapor Deposition Process on Molybdenite Basal Plane Observed by Ultrahigh-Vacuum Scanning Tunneling Microscopy
• Electronic “Edge” State on Molybdenite Basal Plane Observed by Ultrahigh-Vacuum Scanning Tunneling Microscopy and Spectroscopy
• Photoresponse of Titanium Dioxide Surface on Atomic Scale: Site for Visible Light Absorption

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