Photoinduced Redox Reaction Coupled with Limited Electron Mobility at Metal Oxide Surface

Journal Article · Thu Jul 29 00:00:00 EDT 2004 · Journal of Physical Chemistry B

DOI:https://doi.org/10.1021/jp0484027· OSTI ID:15010000

Uetsuka, H; Onishi, Hiroshi; Henderson, Michael A; White, J M

Photoinduced oxidation of an organic adsorbate was examined on an atomically flat surface of titanium dioxide by scanning tunneling microscopy combined with macroscopic analysis of desorbed products. The rate of oxidation was coupled with limited surface mobility of photoexcited electrons, and thereby spatially modulated on the surface exposed to oxygen gas. The dimension of the modulations as small as a few lattice constants of the oxide demonstrates that photoexcited electrons are localized to this extent on the surface covered by adsorbed chemicals.

• Research Organization: Pacific Northwest National Lab., Richland, WA (US), Environmental Molecular Sciences Laboratory (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 15010000
• Report Number(s): PNNL-SA-40953; 9093; KC0302010; TRN: US200433%%417
• Journal Information: Journal of Physical Chemistry B, Vol. 108, Issue 30; Other Information: PBD: 29 Jul 2004
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ELECTRON MOBILITY
OXIDATION
REDOX REACTIONS
PHOTOCHEMICAL REACTIONS
ORGANIC COMPOUNDS
ENVIRONMENTAL MOLECULAR SCIENCES LABORATORY
SCANNING
TUNNELING
MICROSCOPY
TIO2 100
TIO2 (100)
PHOTOCATALYSIS
SEMICONDUCTOR