Adsorbate azimuthal orientation from reflectance anisotropy spectroscopy

Neville Vincent Richardson, BJ Frederick, JR Power, RJ Cole, other 5

Research output: Contribution to journalArticlepeer-review

75 Citations (Scopus)

Abstract

We have determined the azimuthal orientation of an adsorbate on a metal surface from an intramolecular-transition-derived feature in reflectance anisotropy spectroscopy (RAS). Adsorption of 9-anthracene carboxylic acid onto p(2 x 1)O/Cu(110) led to an ordered structure with a strong (2%), derivativelike feature at 4.5 eV. Fresnel theory predicts the measured intensity, functional behavior, and sense of the RAS signal for the molecule aligned along [110]. IR measurements confirm that the molecular plane is perpendicular to the surface and STM measurements support the azimuthal orientation. We reassign the sense of the clean Cu(110) surface RA spectrum.

Original languageEnglish
Pages (from-to)4490-4493
Number of pages4
JournalPhysical Review Letters
Volume80
Issue number20
Publication statusPublished - 18 May 1998

Keywords

  • OPTICAL REFLECTANCE
  • SINGLE-CRYSTALS
  • SURFACE
  • CU(110)
  • ADSORPTION

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