Formation and Diffusion of Water Dimers on Rutile TiO2(110)

J. Matthiesen, J. O. Hansen, S. Wendt, E. Lira, R. Schaub, E. Laegsgaard, F. Besenbacher, B. Hammer

Research output: Contribution to journalArticlepeer-review

73 Citations (Scopus)

Abstract

From an interplay of time-lapsed high resolution scanning tunneling microscopy and density functional theory calculations we reveal the formation and diffusion of water dimers on hydrated rutile TiO2(110)-(1x1) surfaces, i.e., surfaces containing OHbr groups. At temperatures between similar to 150 and similar to 210 K water monomers diffusing along the Ti troughs were found to form stable water dimers that diffuse faster than the water monomers. An H bond mediated rollover mechanism operating for the water dimers explains the experimental findings.

Original languageEnglish
Pages (from-to)226101
Number of pages4
JournalPhysical Review Letters
Volume102
Issue number22
DOIs
Publication statusPublished - Jun 2009

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