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Surface-enhanced Raman scattering from silver-coated opals

Title
Surface-enhanced Raman scattering from silver-coated opals
Authors
Mu, WeiqiangHwang, Dae-KueChang, Robert P. H.Sukharev, MaximTice, Daniel B.Ketterson, John B.
DGIST Authors
Hwang, Dae-Kue
Issue Date
2011-03-28
Citation
Journal of Chemical Physics, 134(12)
Type
Article
Article Type
Article
Keywords
AdsorptionArtificial OpalsBenzenethiolsChemistryCoated FilmsComputer SimulationDielectric LatticesElectric FieldsEnhancement FactorExcitation WavelengthFinite-Difference Time-Domain SimulationFinite Difference Time Domain MethodLaser ExcitationLaser WavelengthMethodologyMonolayersPhenol DerivativePhenolsPolystyrene DerivativePolystyrene SpheresPolystyrenesRaman ScatteringRaman SpectrometrySilicate MineralsSilverSilver FilmSpectrum Analysis, RamanSphere DiameterSpheresSulfhydryl CompoundsSurface Enhanced Raman ScatteringThiol DerivativeThiophenol
ISSN
0021-9606
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. © 2011 American Institute of Physics.
URI
http://hdl.handle.net/20.500.11750/5395
DOI
10.1063/1.3570827
Publisher
American Institute of Physics Publishing
Related Researcher
Files:
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Collection:
Convergence Research Center for Solar Energy1. Journal Articles


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