Low concentration rhodamine 6G observed by surface-enhanced Raman scattering on optimally electrochemically roughened silver substrates

Yu Chuan Liu, Chung Chin Yu, Sen F. Sheu

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Abstract

In this work, the effects of preparation conditions in roughening silver substrates by electrochemical triangular-wave oxidation-reduction cycles (ORC) on surface-enhanced Raman scattering (SERS) were investigated. Based on this prepared substrate, the practical limit of detection (LOD) of rhodamine 6G (R6G) can be reduced by six orders of magnitude from 2 × 10-9 to 2 × 10-15 M, as compared with that of R6G adsorbed on a general procedure-prepared roughened Ag substrate. Further investigations indicate that the content and the oxidation state of Cl on the roughened Ag substrate demonstrate decided effects on the observed SERS.

Original languageEnglish
Pages (from-to)3546-3551
Number of pages6
JournalJournal of Materials Chemistry
Volume16
Issue number35
DOIs
Publication statusPublished - 2006
Externally publishedYes

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Science(all)
  • Materials Chemistry

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