title: Nickel-Oxide-Modified SrTiO3(110)-(4 × 1) Surfaces and Their Interaction with Water.
abstract: Nickel oxide (NiO), deposited onto the strontium titanate (SrTiO3) (110)-(4 × 1) surface, was studied using photoemission spectroscopy (PES), X-ray absorption near edge structure (XANES), and low-energy He+ion scattering (LEIS), as well as scanning tunneling microscopy (STM). The main motivation for studying this system comes from the prominent role it plays in photocatalysis. The (4 × 1) reconstructed SrTiO3(110) surface was previously found to be remarkably inert toward water adsorption under ultrahigh-vacuum conditions. Nickel oxide grows on this surface as patches without any apparent ordered structure. PES and LEIS reveal an upward band bending, a reduction of the band gap, and reactivity toward water adsorption upon deposition of NiO. Spectroscopic results are discussed with respect to the enhanced reactivity toward water of the NiO-loaded surface.
authors.affiliation: Institute of Applied Physics, TU Wien , Wiedner Hauptstraße 8-10, 1040 Vienna, Austria.
authors.forename: Stefan
authors.initials: S
authors.lastname: Gerhold
authors.affiliation: Institute of Applied Physics, TU Wien , Wiedner Hauptstraße 8-10, 1040 Vienna, Austria ; CNISM - Dipartimento di Fisica, Politecnico di Milano , Piazza Leonardo da Vinci 32, I-20133 Milano, Italy.
authors.forename: Michele
authors.initials: M
authors.lastname: Riva
authors.affiliation: Institute of Applied Physics, TU Wien , Wiedner Hauptstraße 8-10, 1040 Vienna, Austria ; Swiss Light Source, Paul Scherrer Institute , 5234 Villigen, Switzerland.
authors.forename: Zhiming
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Institute of Applied Physics, TU Wien , Wiedner Hauptstraße 8-10, 1040 Vienna, Austria.
authors.forename: Roland
authors.initials: R
authors.lastname: Bliem
authors.affiliation: Institute of Applied Physics, TU Wien , Wiedner Hauptstraße 8-10, 1040 Vienna, Austria.
authors.forename: Margareta
authors.initials: M
authors.lastname: Wagner
authors.affiliation: MAX IV Laboratory, Lund University , Ole Römers väg 1, 223 63 Lund, Sweden.
authors.forename: Jacek
authors.initials: J
authors.lastname: Osiecki
authors.affiliation: MAX IV Laboratory, Lund University , Ole Römers väg 1, 223 63 Lund, Sweden.
authors.forename: Karina
authors.initials: K
authors.lastname: Schulte
authors.affiliation: Institute of Applied Physics, TU Wien , Wiedner Hauptstraße 8-10, 1040 Vienna, Austria.
authors.forename: Michael
authors.initials: M
authors.lastname: Schmid
authors.affiliation: Institute of Applied Physics, TU Wien , Wiedner Hauptstraße 8-10, 1040 Vienna, Austria.
authors.forename: Ulrike
authors.initials: U
authors.lastname: Diebold