Surface-enhanced Raman scattering from silver-coated opals

Weiqiang Mu, Dae Kue Hwang, Robert P.H. Chang, Maxim Sukharev, Daniel B. Tice, John B. Ketterson

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We describe surface-enhanced Raman scattering measurements from a benzenethiol monolayer adsorbed on a silver-coated film that is, in turn, deposited on an artificial opal, where the latter is a close-packed three-dimensional dielectric lattice formed from polystyrene spheres. Data for a range of sphere sizes, silver film thicknesses, and laser excitation wavelengths are obtained. Enhancement factors can be in the range of 10 7. To partially explain these large enhancements, we have performed model finite-difference time domain simulations of the position-dependent electric fields generated at the opal surfaces for several experimentally studied laser wavelengths and sphere diameters.

Original languageEnglish
Article number124312
JournalJournal of Chemical Physics
Volume134
Issue number12
DOIs
Publication statusPublished - Mar 28 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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    Mu, W., Hwang, D. K., Chang, R. P. H., Sukharev, M., Tice, D. B., & Ketterson, J. B. (2011). Surface-enhanced Raman scattering from silver-coated opals. Journal of Chemical Physics, 134(12), [124312]. https://doi.org/10.1063/1.3570827