HREELS studies of gold nanoparticles with dialkyl sulphide ligands

Y. Chen, R.E. Palmer, E.J. Shelley, J.A. Preece

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We have employed high resolution electron energy loss spectroscopy (HREELS) to study low energy electron impact on films of gold nanoparticles passivated with dialkyl sulphide (H21C10SC10H21). HREEL spectra obtained in UHV show energy loss peaks due to CHx and CC vibrational modes of the organic ligands together with a mode at 230 cm(-1) assigned to the Au-S stretch. Measurements as a function of impact energy reveal resonances in the intensities centred between 9 and 12 eV. Prolonged exposure of the film to an electron beam at 50 eV, with a dosage of approximately 360 muC cm(-2) causes significant changes in the HREEL spectra. consistent with cleavage of the Au-S bond.

Original languageEnglish
Pages (from-to)208-213
Number of pages6
JournalSurface Science
Publication statusPublished - 10 Apr 2002


  • electron energy loss spectroscopy (EELS)
  • electron bombardment
  • radiation damage
  • clusters
  • sulphides
  • self-assembled monolayers
  • energy electron irradiation
  • alkanethiolate monolayers
  • nanocrystal superlattices
  • alkyl chains
  • surfaces
  • AU(111)
  • adsorption
  • scattering
  • substrate

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