Geometrical characterization of pyrimidine base molecules adsorbed on Cu(1 1 0) surfaces: XPS and NEXAFS studies

M. Furukawa, H. Fujisawa, Satoshi Katano, H. Ogasawara, Y. Kim, Tadahiro Komeda, A. Nilsson, M. Kawai

Research output: Contribution to journalConference articlepeer-review

50 Citations (Scopus)

Abstract

The structures of pyrimidine base molecules of thymine and cytosine adsorbed onto Cu(110) surfaces (θ≪1.0 ML and ≫1.0 ML) have been discussed based on the results of X-ray photoelectron spectroscopy (XPS) and near-edge X-ray absorption fine structure spectroscopy (NEXAFS). The NEXAFS analysis for azimuthal orientation of molecules on surfaces indicates that the adsorbed molecules are in an upright configuration with their π plane parallel to the row structure ([1 1̄ 0] direction), well below saturation coverage (θ ∼ 0.2 ML). Based on the chemical shifts observed in XP spectra (N1s, O1s region), the molecules have been determined to interact with surfaces through their nitrogen atom (lone-pair) next to the carbonyl group (C=O).

Original languageEnglish
Pages (from-to)261-266
Number of pages6
JournalSurface Science
Volume532-535
DOIs
Publication statusPublished - 2003 Jun 10
Externally publishedYes
EventProceedings of the 7th International Conference on Nanometer - Malmo, Sweden
Duration: 2002 Aug 292002 Aug 31

Keywords

  • Biological molecules - nucleic acids
  • Chemisorption
  • Copper
  • Low index single crystal surfaces
  • Near edge extended X-ray absorption fine structure (NEXAFS)
  • Scanning tunneling microscopy
  • Soft X-ray photoelectron spectroscopy
  • Surface chemical reaction

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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