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Structural study of adsorption of isonicotinic acid and related molecules on rutile TiO2(110) I: XAS and STM

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Author

  • Joachim Schnadt
  • J Schiessling
  • JN O'Shea
  • Struan Gray
  • L Patthey
  • M K-J Johansson
  • M Shi
  • J Krempasky
  • J Ahlund
  • PG Karlsson
  • N. Persson
  • Nils Mårtensson
  • PA Bruhwiler
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Summary, in English

X-ray absorption spectroscopy (XAS) and scanning tunneling microscopy (STM) have been used to study the absorption of monolayers of the pyridinecarboxylic acid monomers (isonicotinic acid, nicotinic acid, and picolinic acid) and benzoic acid on a rutile TiO2(1 1 0) surface. We find that the pyridine and phenyl rings are oriented with their planes largely perpendicular to the surface. The azimuthal orientations are strongly influenced by adsorbate-adsorbate interactions, which in each case leads to at least two different molecular species. In order to reach this conclusion a detailed strategy has been developed for the interpretation of angle-dependent XAS data, which does not rely on any curve fitting procedures. (C) 2003 Elsevier B.V. All rights reserved.

Publishing year

2003

Language

English

Pages

39-54

Publication/Series

Surface Science

Volume

540

Issue

1

Document type

Journal article

Publisher

Elsevier

Topic

  • Atom and Molecular Physics and Optics

Keywords

  • chemisorption
  • X-ray absorption spectroscopy
  • scanning tunneling microscopy
  • single crystal surfaces
  • aromatics
  • titanium oxide
  • evaporation and sublimation

Status

Published

ISBN/ISSN/Other

  • ISSN: 0039-6028