title: Formation and diffusion of water dimers on rutile TiO2(110).
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 OH_{br} groups. At temperatures between approximately 150 and approximately 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.
authors: Interdisciplinary Nanoscience Center (iNANO) and Department of Physics and Astronomy, Aarhus University, DK 8000 Aarhus C, Denmark.
authors: J
authors: J
authors: Matthiesen
authors: J O
authors: JO
authors: Hansen
authors: S
authors: S
authors: Wendt
authors: E
authors: E
authors: Lira
authors: R
authors: R
authors: Schaub
authors: E
authors: E
authors: Laegsgaard
authors: F
authors: F
authors: Besenbacher
authors: B
authors: B
authors: Hammer