Yim, CM;
Pang, CL;
Thornton, G;
(2010)
Oxygen Vacancy Origin of the Surface Band-Gap State of TiO2(110).
PHYS REV LETT
, 104
(3)
, Article 036806. 10.1103/PhysRevLett.104.036806.
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Abstract
Scanning tunneling microscopy and photoemission spectroscopy have been used to determine the origin of the band-gap state in rutile TiO2(110). This state has long been attributed to oxygen vacancies (O-b vac). However, recently an alternative origin has been suggested, namely, subsurface interstitial Ti species. Here, we use electron bombardment to vary the O-b vac density while monitoring the band-gap state with photoemission spectroscopy. Our results show that O-b vac make the dominant contribution to the photoemission peak and that its magnitude is directly proportional to the O-b vac density.
| Type: | Article |
|---|---|
| Title: | Oxygen Vacancy Origin of the Surface Band-Gap State of TiO2(110) |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.104.036806 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.104.036806 |
| Language: | English |
| Additional information: | © 2010 The American Physical Society |
| Keywords: | RUTILE TIO2(110), OH GROUPS, TIO2, DISSOCIATION, O-2, WATER, REACTIVITY, DEFECTS, SITES, H2O |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/126610 |
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