Electrochemically-controlled waveguide-coupled surface plasmon sensing
Electrochemically-controlled waveguide-coupled surface plasmon sensing
A surface plasmon resonance sensing device has been constructed, in which excitation of a surface plasmon on a metal film is achieved by coupling from light propagating in an optical waveguide. The metal film cladding has been used as an electrode surface and it is proposed that these structures may be applied as novel optoelectrochemical sensors. Specific cationic adsorption has been monitored in potential regions where the metal free-electron contribution is small, and the sensitivity of this sensing technique has been deduced by comparison with ellipsometric measurements. The interfacial model used to analyse the ellipsometric results has been tested by calculating coverage by water in the water + ethylene glycol mixture employed in the surface plasmon device. The high sensitivity of this technique to adsorbed films is found to be greater than that predicted by the theoretical model described, and reasons for this discrepancy are discussed.
surface plasmon, optical waveguide, adsorption
11-22
Lavers, C.R.
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Harris, R.D.
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Hao, S.
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Wilkinson, J.S.
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O'Dwyer, K.
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Brust, M.
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Schiffrin, D.J.
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2 May 1995
Lavers, C.R.
16297c8f-6625-4e72-9699-4d8bfe464600
Harris, R.D.
e972b676-3335-44cd-b6e8-0dae17c550c3
Hao, S.
c8f1bb26-119c-425f-bd7d-32071b2ff6d2
Wilkinson, J.S.
73483cf3-d9f2-4688-9b09-1c84257884ca
O'Dwyer, K.
44edf691-33b6-423f-be28-f289b3a62ab6
Brust, M.
9b9be72b-3ccb-43d0-9d86-723ad680402b
Schiffrin, D.J.
f9d7c157-18a5-4532-9ea2-80755bdc0cc0
Lavers, C.R., Harris, R.D., Hao, S., Wilkinson, J.S., O'Dwyer, K., Brust, M. and Schiffrin, D.J.
(1995)
Electrochemically-controlled waveguide-coupled surface plasmon sensing.
Journal of Electroanalytical Chemistry, 387 (1-2), .
(doi:10.1016/0022-0728(95)03865-E).
Abstract
A surface plasmon resonance sensing device has been constructed, in which excitation of a surface plasmon on a metal film is achieved by coupling from light propagating in an optical waveguide. The metal film cladding has been used as an electrode surface and it is proposed that these structures may be applied as novel optoelectrochemical sensors. Specific cationic adsorption has been monitored in potential regions where the metal free-electron contribution is small, and the sensitivity of this sensing technique has been deduced by comparison with ellipsometric measurements. The interfacial model used to analyse the ellipsometric results has been tested by calculating coverage by water in the water + ethylene glycol mixture employed in the surface plasmon device. The high sensitivity of this technique to adsorbed films is found to be greater than that predicted by the theoretical model described, and reasons for this discrepancy are discussed.
More information
Published date: 2 May 1995
Keywords:
surface plasmon, optical waveguide, adsorption
Identifiers
Local EPrints ID: 78192
URI: http://eprints.soton.ac.uk/id/eprint/78192
ISSN: 1572-6657
PURE UUID: db071809-b464-48d1-bd9f-efe093b932e6
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Date deposited: 11 Mar 2010
Last modified: 14 Mar 2024 02:32
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Contributors
Author:
C.R. Lavers
Author:
R.D. Harris
Author:
S. Hao
Author:
K. O'Dwyer
Author:
M. Brust
Author:
D.J. Schiffrin
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