Surface enhanced Raman scattering of organic sample powders spread over vacuum-evaporated silver thin film

T. Wadayama, M. Oishi, A. Hatta

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Surface enhanced Raman scattering (SERS) from samples prepared by spreading para-nitrobenzoic acid (PNBA) and adenosine powders over silver thin films was achieved. The SERS intensities of the ionized PNBA on the silver film increase with increased applied pressure through a cover-glass and reach a maximum at 0.6 MPa. In contrast, the signals caused by adenosine remain nearly unchanged under applied pressures of 0-0.6 MPa. Beyond 0.6 MPa, the signals attributable to samples decrease in intensity. Atomic force microprobe images reveal that nanometer-scale surface morphology is changed by 0.8 MPa pressure, suggesting that the decrease in SERS intensity is related to pressure-induced morphological changes. Results obtained in this study indicate that SERS spectra are obtainable easily, without solvents, under ambient conditions using dispersion of the sample powder.

Original languageEnglish
Pages (from-to)2713-2717
Number of pages5
JournalApplied Surface Science
Volume253
Issue number5
DOIs
Publication statusPublished - 2006 Dec 30

Keywords

  • Adenosine
  • Atomic force microprobe
  • Silver
  • Surface enhanced Raman scattering
  • para-Nitrobenzoic acid

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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