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Growth of TiO2(B)(001) on Au(111) by Chemical Vapor Deposition
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
Norwegian University of Science and Technology (NTNU).
University of Bremen.
Norwegian University of Science and Technology (NTNU).
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2015 (English)In: Surface Science, ISSN 0039-6028, E-ISSN 1879-2758, Vol. 633, 102-108 p.Article in journal (Refereed) Published
Abstract [en]

This study presents how a TiO2(B) film exposing the (001) face can be grown on Au(111) by chemical vapor deposition. Identification and characterization of the TiO2(B)(001) layer are carried out with low-energy electron diffraction (LEED), synchrotron radiation photoelectron spectroscopy (PES), scanning tunneling microscopy (STM) and X-ray absorption spectroscopy (XAS). Formation of the TiO2(B) film requires a two-step preparation procedure: deposition at 280 °C followed by annealing to 500 °C. This suggests that the interaction between a substrate and an overlayer stabilizes the TiO2(B) film, preventing the formation of thermodynamically more stable rutile islands. The study thus gives insight into how the morphology and the atomic structure of the titania overlayer can be controlled.

Place, publisher, year, edition, pages
2015. Vol. 633, 102-108 p.
Keyword [en]
TiO2, Au(111), CVD, titania, gold
National Category
Condensed Matter Physics Atom and Molecular Physics and Optics
Research subject
Physics with spec. in Atomic, Molecular and Condensed Matter Physics
URN: urn:nbn:se:uu:diva-224091DOI: 10.1016/j.susc.2014.10.011ISI: 000348336000015OAI: oai:DiVA.org:uu-224091DiVA: diva2:715326
Available from: 2014-05-04 Created: 2014-05-02 Last updated: 2015-03-10Bibliographically approved
In thesis
1. Titania Nanoscale Films and Surfaces: Surface Science Investigation of Structure and Properties
Open this publication in new window or tab >>Titania Nanoscale Films and Surfaces: Surface Science Investigation of Structure and Properties
2014 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis presents surface science studies, investigating several aspects of titanium dioxide at the atomic scale. The greater part of this work is devoted to the preparation by chemical vapor deposition (CVD) of titanium(IV) tetraisopropoxide (TTIP) of ultrathin TiO2 or TiOx films on Au(111). Four ordered structures were growth and characterized. It was also demonstrated how the morphology of the film (wetting film vs island) can be tailored. The acquired knowledge about the CVD process was exploited to load nano porous gold with titania, enhancing its catalytic activity. The reactivity towards water adsorption of the titania structures on Au(111) was also investigated. Finally, part of this work concerned the studying of the behavior of water on the stoichiometric rutile TiO2(110) surface, combining the experiments with density-functional theory (DFT) calculations and (kinetic) Monte Carlo simulations. The main experimental techniques used in this work are low-energy electron diffraction (LEED), scanning tunneling microscopy (STM) and photoelectron spectroscopy (PES).

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2014. 71 p.
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1154
Photoelectron spectroscopy, PES, XPS, scanning tunneling microscopy, STM, titania, titanium oxide, TiO2, Au(111), gold, water, H2O, rutile
National Category
Atom and Molecular Physics and Optics Condensed Matter Physics
urn:nbn:se:uu:diva-224124 (URN)978-91-554-8969-4 (ISBN)
Public defence
2014-06-13, Polhemsalen 10134, Ångström Laboratory, Lägerhyddsvägen 1, Uppsala, 13:15 (English)
Available from: 2014-05-22 Created: 2014-05-05 Last updated: 2014-06-30

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