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.
Bibliographical noteThe information about affiliations in this record was updated in December 2015.
The record was previously connected to the following departments: Solid State Physics (011013006), Synchrotron Radiation Research (011013009), Chemical Physics (S) (011001060), Max-laboratory (011012005)
Subject classification (UKÄ)
- Atom and Molecular Physics and Optics
- X-ray absorption spectroscopy
- scanning tunneling microscopy
- single crystal surfaces
- titanium oxide
- evaporation and sublimation