Improved surface-enhanced Raman scattering on electrochemically roughened silver substrates prepared in bielectrolyte solutions

Yu Chuan Liu, Cheng C. Wang, Jeng Feng Tsai

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In this work, the effect of supplemental LiClO4 electrolytes in KCl solutions used in roughening silver substrates by electrochemical triangular-wave oxidation-reduction cycles (ORC) on surface-enhanced Raman scattering (SERS) was first investigated. To prepare SERS-active substrates by ORC procedures, electrolytes of KCl were generally employed. In contrast, LiClO4 ones were unsuitable for producing SERS-active substrates. Encouragingly, SERS of Rhodamine 6G (R6G) adsorbed on the roughened Ag substrate prepared in an aqueous solution containing KCl and LiClO4 electrolytes exhibits a higher intensity by one order of magnitude, as compared with that of R6G adsorbed on a roughened Ag substrate prepared in a solution only containing KCl. Further investigations indicate that the oxidation state of Cl on the roughened Ag substrate demonstrates decided effects on this improved SERS.

Original languageEnglish
Pages (from-to)433-438
Number of pages6
JournalAnalytica Chimica Acta
Volume584
Issue number2
DOIs
Publication statusPublished - Feb 19 2007
Externally publishedYes

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Keywords

  • Electrolytes
  • Silver Substrates
  • Surface-enhanced Raman scattering

ASJC Scopus subject areas

  • Biochemistry
  • Analytical Chemistry
  • Spectroscopy
  • Environmental Chemistry

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