Improved performances on surface-enhanced Raman scattering based on electrochemically roughened gold substrates modified with SiO2 nanoparticles

Yu Chuan Liu, Chung Chin Yu, Ting Chu Hsu

研究成果: 雜誌貢獻文章同行評審

8 引文 斯高帕斯(Scopus)

摘要

In this work, we use electrochemical oxidation-reduction cycles (ORC) methods to prepare surface-enhanced Raman scattering (SERS)-active gold substrates modified with SiO2 nanoparticles to improve the corresponding SERS performances. Based on the modified substrates, the SERS of Rhodamine 6G (R6G) exhibits a higher intensity by 3-fold of magnitude, as compared with that of R6G adsorbed on a SERS-active Au substrate without the modification of SiO2 nanoparticles. Moreover, the SERS enhancement capabilities of the modified and the unmodified Au substrates are seriously destroyed at temperatures higher than 250 and 200°C, respectively. These results indicate that the modification of SiO2 nanoparticles can improve the thermal stability of SERS-active substrates. The aging in SERS intensity is also depressed on this modified Au substrate due to the contribution of SiO2 nanoparticles to SERS effects.

原文英語
頁(從 - 到)1682-1686
頁數5
期刊Journal of Raman Spectroscopy
40
發行號11
DOIs
出版狀態已發佈 - 2009
對外發佈

ASJC Scopus subject areas

  • 光譜
  • 材料科學(全部)

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