Improved stabilities on surface-enhanced Raman scattering-active Ag/Al 2O3 films on substrates

Fu Der Mai, Kuang Hsuan Yang, Yu Chuan Liu, 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

As is shown in the literature, surface-enhanced Raman scattering (SERS)-active Ag films obtained by the salting-out of Ag colloids from solutions with some salts, are popularly used to examine the structure of analytes. SERS-active Ag nanoparticles (NPs) demonstrate more significant SERS effects than Au NPs, however, problems regarding the stabilities of SERS-active Ag NPs remain to be overcome. In this work, Ag/Al2O3 colloids were prepared in 0.1 M HNO3 solutions containing Al2O 3 NPs with higher heat capacity by sonoelectrochemical methods. SERS-active Ag/Al2O3 films deposited on glass slides were prepared by the addition of a saturated NaCl solution in the prepared Ag/Al 2O3 colloids-containing solution. In an acceptable sacrifice of Raman intensity by ca. 30% magnitude, the prepared Ag/Al 2O3 films markedly improved thermal stability by raising the operation temperature over 100 °C, compared to Ag films. Meanwhile, aging of SERS enhancement capability in an atmosphere of relative humidity (RH) of 50% and 20% (v/v) O2 at 30 °C is significantly depressed using Ag/Al2O3 films.

原文英語
頁(從 - 到)5906-5912
頁數7
期刊Analyst
137
發行號24
DOIs
出版狀態已發佈 - 十二月 21 2012

ASJC Scopus subject areas

  • 分析化學
  • 光譜
  • 電化學
  • 生物化學
  • 環境化學

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