Effects of electrolytes used in roughening gold substrates by oxidation-reduction cycles on surface-enhanced Raman scattering

Yu Chuan Liu, Chee Chan Wang, Chun En Tsai

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

In this work, the effects of electrolytes used in roughening gold substrates by electrochemical methods on surface-enhanced Raman scattering (SERS) were first investigated. First, gold substrates were roughened by triangular-wave oxidation-reduction cycles (ORC) in aqueous solutions containing different kinds of 0.1 M electrolytes. Then Rhodamine 6G (R6G) was used as Raman probe to examine this effect of electrolytes used on the SERS observed. The result indicates that the highest intensity of SERS of R6G was obtained on the roughened Au substrate prepared in 0.1 M NaCl, which was less used in the literature. Meanwhile, it was also found that the rougher surface morphology observed, which is contributive to the higher SERS obtained, is corresponding to the smaller cathodic peak area shown in the cyclic voltammograms for roughening the Au substrate.

Original languageEnglish
Pages (from-to)1345-1350
Number of pages6
JournalElectrochemistry Communications
Volume7
Issue number12
DOIs
Publication statusPublished - Dec 2005
Externally publishedYes

Fingerprint

Gold
Electrolytes
Raman scattering
Substrates
Surface morphology
Oxidation-Reduction
rhodamine 6G

Keywords

  • Electrolytes
  • Oxidation-reduction cycles
  • Surface-enhanced Raman scattering

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

Cite this

Effects of electrolytes used in roughening gold substrates by oxidation-reduction cycles on surface-enhanced Raman scattering. / Liu, Yu Chuan; Wang, Chee Chan; Tsai, Chun En.

In: Electrochemistry Communications, Vol. 7, No. 12, 12.2005, p. 1345-1350.

Research output: Contribution to journalArticle

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AB - In this work, the effects of electrolytes used in roughening gold substrates by electrochemical methods on surface-enhanced Raman scattering (SERS) were first investigated. First, gold substrates were roughened by triangular-wave oxidation-reduction cycles (ORC) in aqueous solutions containing different kinds of 0.1 M electrolytes. Then Rhodamine 6G (R6G) was used as Raman probe to examine this effect of electrolytes used on the SERS observed. The result indicates that the highest intensity of SERS of R6G was obtained on the roughened Au substrate prepared in 0.1 M NaCl, which was less used in the literature. Meanwhile, it was also found that the rougher surface morphology observed, which is contributive to the higher SERS obtained, is corresponding to the smaller cathodic peak area shown in the cyclic voltammograms for roughening the Au substrate.

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