Optical signatures of thiolate/Cu(110) and S/Cu(110) surface structures

D. S. Martin, Paul D. Lane, G. E. Isted, R. J. Cole, N. P. Blanchard

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Abstract

The optical properties of thiolate/Cu(110) and S/Cu(110) surfaces created by the adsorption of methanethiol and L-cysteine are investigated using reflection anisotropy spectroscopy (RAS). We find that characteristic optical signatures are obtained from these systems. The experimental RAS profiles are simulated using a four-phase model consisting of vacuum, anisotropic overlayer, anisotropic surface, and isotropic substrate. The results of the simulations suggest that a broad optical transition at 3.8 eV is associated with the thiolate/Cu (110) interface, consistent with recent first-principles calculations [S. D'Agostino et al., Phys. Rev. B 75, 195444 (2007)].

Original languageEnglish
Article number075428
Number of pages6
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume82
Issue number7
DOIs
Publication statusPublished - 15 Aug 2010

Keywords

  • REFLECTANCE-ANISOTROPY SPECTROSCOPY
  • SELF-ASSEMBLING MONOLAYERS
  • CU(110) SURFACES
  • DIFFERENCE SPECTROSCOPY
  • ADSORPTION
  • CHEMISORPTION
  • ORIENTATION
  • AU(110)
  • GROWTH
  • STATES

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