Role of adsorbate structure in the dynamics of surface photodissociation

D. Howard Fairbrother*, Victor P. Holbert, Kimberly A. Briggman, Peter Stair, Eric Weitz

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Photofragments produced following 257 nm irradiation of physiosorbed methyl iodide on MgO(100) and TiO 2(110) have been studied using resonantly enhanced multiphoton ionization coupled with time-of-flight mass spectrometry. The observed signal is associated with photofragment production from methyl iodide chromophores present in the near surface region. The dependence of the velocity distribution of methyl photofragments on ejection angle and polarization of the photolysis beam indicates that the multilayer film is composed primarily of an anti-parallel arrangement of methyl iodide molecules whose C-I bonds are aligned close to the surface normal. At submonolayer coverage on TiO 2 methyl iodide is predominantly in a parallel orientation with the iodine close to the surface and the methyl group pointing away from the surface.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Pages248-259
Number of pages12
StatePublished - Dec 1 1995
EventLaser Techniques for Surface Science II - San Diego, CA, USA
Duration: Jul 12 1995Jul 14 1995

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume2547
ISSN (Print)0277-786X

Other

OtherLaser Techniques for Surface Science II
CitySan Diego, CA, USA
Period7/12/957/14/95

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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