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Probing the local electronic structure of the cross-linked (1×2) reconstruction of rutile TiO2(110)

Yim, CM; Pang, CL; Thornton, G; (2016) Probing the local electronic structure of the cross-linked (1×2) reconstruction of rutile TiO2(110). Surface Science , 650 pp. 71-75. 10.1016/j.susc.2015.04.022. Green open access

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Abstract

The electronic structure of cross-linked TiO2(110)-(1×2) has been investigated using scanning tunneling spectroscopy (STS) and by monitoring changes in ultraviolet photoelectron spectroscopy (UPS) following exposure of the surface to O2. STS reveals two states located in the bandgap, at 0.7 and 1.5 eV below the Fermi level. The population of these two states varies over different parts of the (1×2)- reconstructed surface. An addition state at 1.1 eV above the Fermi level is observed at the double link part of the structure. All of the bandgap states are attenuated following exposure to O2, while the workfunction is increased. We attribute this to an electron transfer from the surface to the adsorbed oxygen.

Type: Article
Title: Probing the local electronic structure of the cross-linked (1×2) reconstruction of rutile TiO2(110)
Location: The Netherlands
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.susc.2015.04.022
Publisher version: http://dx.doi.org/10.1016/j.susc.2015.04.022
Language: English
Additional information: Copyright © 2015. This manuscript version is published under a Creative Commons Attribution Non-commercial Non-derivative 4.0 International licence (CC BY-NC-ND 4.0). This licence allows you to share, copy, distribute and transmit the work for personal and non-commercial use providing author and publisher attribution is clearly stated. Further details about CC BY licences are available at http://creativecommons.org/licenses/by/4.0.
Keywords: Tunneling spectroscopy; Titanium dioxide; Reconstruction
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/1469332
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