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 journalArticlepeer-review

12 Scopus citations


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 (US)
Article number124312
JournalJournal of Chemical Physics
Issue number12
StatePublished - Mar 28 2011

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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