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

doi:10.1063/1.3570827

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

Division of Energy Techonology

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

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 language	English
Article number	124312
Journal	Journal of Chemical Physics
Volume	134
Issue number	12
DOIs	https://doi.org/10.1063/1.3570827
State	Published - 28 Mar 2011

Bibliographical note

Funding Information:
We would like to thank R. Van Duyne together with his student Kevin Biggs for advice on SERS and its detection, particularly with the attachment of benzenethiol and the evaluation of EFs. The SERS work reported here was supported by the AFOSR DARPA program under Grant No. FA9550–08-1-0221, while the preparation of opals is supported by the National Science Foundation (NSF), particularly Grant Nos. ESI-04-26328 and DMR-05-20513.

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title = "Surface-enhanced Raman scattering from silver-coated opals",

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.",

author = "Weiqiang Mu and Hwang, {Dae Kue} and Chang, {Robert P.H.} and Maxim Sukharev and Tice, {Daniel B.} and Ketterson, {John B.}",

note = "Funding Information: We would like to thank R. Van Duyne together with his student Kevin Biggs for advice on SERS and its detection, particularly with the attachment of benzenethiol and the evaluation of EFs. The SERS work reported here was supported by the AFOSR DARPA program under Grant No. FA9550–08-1-0221, while the preparation of opals is supported by the National Science Foundation (NSF), particularly Grant Nos. ESI-04-26328 and DMR-05-20513.",

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AU - Chang, Robert P.H.

AU - Sukharev, Maxim

AU - Tice, Daniel B.

AU - Ketterson, John B.

N1 - Funding Information: We would like to thank R. Van Duyne together with his student Kevin Biggs for advice on SERS and its detection, particularly with the attachment of benzenethiol and the evaluation of EFs. The SERS work reported here was supported by the AFOSR DARPA program under Grant No. FA9550–08-1-0221, while the preparation of opals is supported by the National Science Foundation (NSF), particularly Grant Nos. ESI-04-26328 and DMR-05-20513.

PY - 2011/3/28

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N2 - 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.

AB - 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.

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Surface-enhanced Raman scattering from silver-coated opals

Abstract

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