Reproducible SERRS from structured gold surfaces
Reproducible SERRS from structured gold surfaces
Metallic substrates with ordered spherical cavities have been shown to be very effective for surface-enhanced Raman scattering (SERS) and can be fabricated reproducibly using electrodeposition. The sensitivity of detection is increased by several orders of magnitude by using surface-enhanced resonance Raman scattering (SERRS). In this report we demonstrate SERRS for the first time on electrodeposited gold films templated with colloidal spheres and demonstrate the reproducibility of the response. We also obtain a direct comparison between SERRS and SERS by choosing two dyes, Cy5 and Cy3, which are similar in structure but differ in their excitation maxima, such that one is resonant and the other non-resonant with our laser excitation. As expected, the resonant enhancement is found to be of the order of 103 over and above that for SERS. The net SERRS enhancements are shown to be of the order of 109. We also find that the resonant enhancement profile of the different peaks for the chromophore follows the plasmonic resonance absorption spectrum obtained for the structured surface
6016-6020
Mahajan, Sumeet
b131f40a-479e-4432-b662-19d60d4069e9
Baumberg, Jeremy J.
51423b5f-bdb8-4851-8d50-472253ceb12c
Russell, Andrea E.
b6b7c748-efc1-4d5d-8a7a-8e4b69396169
Bartlett, Philip N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
2007
Mahajan, Sumeet
b131f40a-479e-4432-b662-19d60d4069e9
Baumberg, Jeremy J.
51423b5f-bdb8-4851-8d50-472253ceb12c
Russell, Andrea E.
b6b7c748-efc1-4d5d-8a7a-8e4b69396169
Bartlett, Philip N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
Mahajan, Sumeet, Baumberg, Jeremy J., Russell, Andrea E. and Bartlett, Philip N.
(2007)
Reproducible SERRS from structured gold surfaces.
Physical Chemistry Chemical Physics, 9 (45), .
(doi:10.1039/b712144j).
Abstract
Metallic substrates with ordered spherical cavities have been shown to be very effective for surface-enhanced Raman scattering (SERS) and can be fabricated reproducibly using electrodeposition. The sensitivity of detection is increased by several orders of magnitude by using surface-enhanced resonance Raman scattering (SERRS). In this report we demonstrate SERRS for the first time on electrodeposited gold films templated with colloidal spheres and demonstrate the reproducibility of the response. We also obtain a direct comparison between SERRS and SERS by choosing two dyes, Cy5 and Cy3, which are similar in structure but differ in their excitation maxima, such that one is resonant and the other non-resonant with our laser excitation. As expected, the resonant enhancement is found to be of the order of 103 over and above that for SERS. The net SERRS enhancements are shown to be of the order of 109. We also find that the resonant enhancement profile of the different peaks for the chromophore follows the plasmonic resonance absorption spectrum obtained for the structured surface
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Published date: 2007
Organisations:
Chemistry, Institute for Life Sciences
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Local EPrints ID: 145843
URI: http://eprints.soton.ac.uk/id/eprint/145843
ISSN: 1463-9076
PURE UUID: 03606452-a790-4bb8-a60c-20e87955f92d
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Date deposited: 07 Jun 2010 10:23
Last modified: 14 Mar 2024 02:52
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Author:
Jeremy J. Baumberg
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