Surface hydroxyl formation on vacuum-annealed TiO[sub 2](110)

Fujino, Toshiaki; Katayama, Mitsuhiro; Inudzuka, Katsuhiko; Okuno, Tomohisa; Oura, Kenjiro; Hirao, Takashi
October 2001
Applied Physics Letters;10/22/2001, Vol. 79 Issue 17, p2716
Academic Journal
The change in surface composition and structure of a rutile TiO[sub 2](110) surface during thermal annealing in an ultrahigh vacuum was studied by coaxial impact–collision ion scattering spectroscopy and time-of-flight elastic recoil detection analysis. When the clean TiO[sub 2](110) surface with a 1×1 bridging-oxygen-rows structure was obtained by annealing at 730 °C, about one monolayer of hydrogen atoms still resided on the surface. These hydrogen atoms were assigned to surface hydroxyls as an ingredient of the TiO[sub 2](110)1×1 structure, which was formed in the self-restoration process of surface oxygen vacancy defects by dissociative adsorption of water molecules during thermal annealing. © 2001 American Institute of Physics.


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