Strategy for obtaining improved surface-enhanced Raman scattering by combining electrochemical and plasmas technologies

Chee Chan Wang, Yu Chuan Liu

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, surface-enhanced Raman scattering (SERS)-active gold substrates were first developed by combining the technologies of oxidation-reduction cycles (ORCs) and plasmas treatments in roughening metal substrates. First, a gold substrate was treated by argon plasmas. Then the treated gold substrate was further roughened by triangular-wave ORCs in an aqueous solution containing 0.1 M HCl. Encouragingly, the SERS of Rhodamine 6G (R6G) adsorbed on this roughened gold substrate modified by argon plasmas pretreatment exhibits a higher intensity by 10-fold of magnitude and a better resolution, as compared with the SERS of R6G adsorbed on an unmodified roughened gold substrate. Meanwhile, the probing concentration of R6G adsorbed on the modified substrate can be reduced by one order. It was also found that the pretreatment of argon plasmas demonstrates a positive effect on the (2 2 0) face of Au partly changing into the (1 1 1) face with the lowest surface energy after the ORCs roughening, which is contributive to the improved SERS observed.

原文英語
頁(從 - 到)1199-1204
頁數6
期刊Electrochemistry Communications
7
發行號12
DOIs
出版狀態已發佈 - 十二月 2005
對外發佈

ASJC Scopus subject areas

  • 化學工程 (全部)
  • 分析化學
  • 電化學

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