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

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

研究成果: 雜誌貢獻文章同行評審

5 引文 斯高帕斯(Scopus)

摘要

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.

原文英語
頁(從 - 到)433-438
頁數6
期刊Analytica Chimica Acta
584
發行號2
DOIs
出版狀態已發佈 - 二月 19 2007
對外發佈

ASJC Scopus subject areas

  • 生物化學
  • 分析化學
  • 光譜
  • 環境化學

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