Surface-enhanced Raman scattering-active Au/SiO 2 nanocomposites prepared using sonoelectrochemical pulse deposition methods

Chun Chao Chang, Kuang Hsuan Yang, Yu Chuan Liu, Ting Chu Hsu, Fu Der Mai

研究成果: 雜誌貢獻文章同行評審

34 引文 斯高帕斯(Scopus)

摘要

For improving signals, reproducibility, and stabilities of surface-enhanced Raman scattering (SERS), numerous technologies have recently been reported in the literature. However, the fabrication processes are usually complicated. It is well-known that nanoparticles (NPs) of Au and SiO 2 are SERS active and inactive materials, respectively. In this work, a simple synthesis route based on sonoelectrochemical pulse deposition (SEPD) methods has been developed to synthesize effectively SERS-active Au/SiO 2 nanocomposites (NCs) with an enhancement factor of 5.4 × 10 8. Experimental results indicate that pH value of solution and addition of SiO 2 NPs before and after oxidation-reduction cycles (ORCs) can significantly influence the corresponding SERS activities. Encouragingly, the SERS of Rhodamine 6G (R6G) adsorbed on the developed Au/SiO 2 NCs exhibits a higher intensity by more than 1 order of magnitude, as compared with that of R6G adsorbed on Au NPs synthesized using the same method. Moreover, this improved SERS activity is successfully verified from the mechanisms of electromagnetic (EM) and chemical (CHEM) enhancements.
原文英語
頁(從 - 到)4700-4707
頁數8
期刊ACS Applied Materials and Interfaces
4
發行號9
DOIs
出版狀態已發佈 - 九月 26 2012

ASJC Scopus subject areas

  • 材料科學(全部)

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