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

Författare:
  • Joachim Schnadt
  • J Schiessling
  • JN O'Shea
  • Struan Gray
  • L Patthey
  • M K-J Johansson
  • M Shi
  • J Krempasky
  • J Ahlund
  • PG Karlsson
  • P Persson
  • Nils Mårtensson
  • PA Bruhwiler
Publiceringsår: 2003
Språk: Engelska
Sidor: 39-54
Publikation/Tidskrift/Serie: Surface Science
Volym: 540
Nummer: 1
Dokumenttyp: Artikel
Förlag: Elsevier Science B.V.

Sammanfattning

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.

Disputation

Nyckelord

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

Övriga

Published
Yes
  • ISSN: 0039-6028

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