Molecular desorption in bombardment mass spectrometries

Ramona S. Taylor, Christopher L. Brummel, Nicholas Winograd, Barbara J. Garrison, John C. Vickerman

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25 Scopus citations

Abstract

Molecular dynamics simulations have been performed to gain microscopic insight into those factors which influence the ejection due to ion bombardment of molecules adsorbed on solid substrates. The specific system modeled is a pentylidyne (C5H9) film adsorbed on Pt{111} and C{111}. Lowering the binding energy of the film to the substrate from 2.7 to 0.6 eV increases the total yield of ejected particles. The bombardment of the film bound by 2.7 eV results in considerable fragmentation of the C5H9 adsorbate while the bombardment of the film bound by 0.6 eV results in the desorption of the intact molecular adsorbate.

Original languageEnglish (US)
Pages (from-to)575-579
Number of pages5
JournalChemical Physics Letters
Volume233
Issue number5-6
DOIs
StatePublished - Feb 24 1995

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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