Interesting substrate-temperature dependence on surface-enhanced Raman scattering

Kuang Hsuan Yang, Yu Chuan Liu, Ting C. Hsu

研究成果: 雜誌貢獻文章同行評審

13 引文 斯高帕斯(Scopus)

摘要

We report here an interesting phenomenon that surface-enhanced Raman scattering (SERS) intensity can be significantly improved on electrochemically roughened silver substrates at slightly elevated temperatures. Experimental results indicate that the SERS enhancement capabilities are gradually raised from 25 °C to a maximum at 50 °C and monotonically decreased from 50 to 60 °C. The SERS of Rhodamine 6G (R6G) adsorbed on the SERS-active substrate at 50 °C exhibits a higher intensity by 7-fold of magnitude, as compared with that of R6G adsorbed on the SERS-active substrate at 25 °C. More interestingly, this phenomenon is reversible. The SERS intensity of R6G was also decreased to its original level when the temperature of the elevated substrate was reduced from 50 to 25 °C. These interesting phenomena are valid for all different target molecules generally used in SERS studies. Further experiments reveal that the increase in SERS enhancement capability of SERS-active Ag substrates at slightly elevated temperatures may mainly comes from the corresponding increase of the chemical (CHEM) enhancements.

原文英語
頁(從 - 到)184-191
頁數8
期刊Journal of Electroanalytical Chemistry
632
發行號1-2
DOIs
出版狀態已發佈 - 七月 1 2009
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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