Improved surface-enhanced Raman scattering performances on silver-silica nanocomposites

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

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


In this work, surface-enhanced Raman scattering (SERS)-active silver substrates were prepared by electrochemical methods via oxidation-reduction cycles. These SERS-active substrates were further modified with different contents of SiO2 nanoparticles to improve their corresponding SERS performances. With the modified substrate prepared in a 0.1 mM SiO2 solution, the SERS of Rhodamine 6G (R6G) exhibits a higher intensity by a 3-fold order of magnitude as compared with that of R6G adsorbed on a SERS-active Ag substrate without the incorporation of SiO2 nanoparticles. Moreover, the modified substrate prepared in a 1 mM SiO2 solution can improve the thermal stability of the SERS-active Ag substrate. The operation temperature of the modified Ag substrate can be raised by 50 °C. The aging SERS intensity is also depressed on this modified Ag substrate due to the contribution of SiO2 nanoparticles to SERS effects.

Original languageEnglish
Pages (from-to)8162-8168
Number of pages7
JournalJournal of Physical Chemistry C
Issue number19
Publication statusPublished - May 14 2009
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Energy(all)
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films


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