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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
Citation
Journal of Chemical Physics, 134(12)
Type
Article
Article Type
Article
Keywords
PolystyrenesPyridineRaman ScatteringRaman SpectrometrySilicate MineralsSilverSilverSilver FilmSPECTRASPECTROSCOPYSpectrum Analysis, RamanSphere DiameterSPHERESSulfhydryl CompoundsSurface Enhanced Raman ScatteringThiol DerivativeThiophenolZnOPolystyrene SpheresAdsorptionAdsorptionAdsorptionArticleArtificial OpalsBENZENETHIOLBenzenethiolsChemistryCoated FilmsComputer SimulationDielectric LatticesElectric FieldsElectrodeEnhancement FactorExcitation WavelengthFinite-Difference Time-Domain SimulationFinite Difference Time Domain MethodGOLD NANOPARTICLESLaser ExcitationLaser WavelengthMETALLIC-FILMSMethodologyMonolayersOPTICAL-PROPERTIESPhenol DerivativePhenolsPolystyrene Derivative
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:
There are no files associated with this item.
Collection:
Division of Energy Technology1. Journal Articles


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