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Waveguide surface plasmon resonance studies of surface reactions on gold electrodes

Waveguide surface plasmon resonance studies of surface reactions on gold electrodes
Waveguide surface plasmon resonance studies of surface reactions on gold electrodes
We describe the fabrication and characterisation of gold-coated graded index channel waveguide sensors designed for simultaneous electrochemical and surface plasmon resonance studies. The active sensing electrode area is a thin gold film between 0.5 and 5 mm in length and 200 µm wide deposited on top of a 3 µm wide waveguide which forms one arm of a Y-junction while the other arm of the Y-junction serves as a reference. Using these devices we have measured simultaneously the changes in transmittance through the device whilst carrying out cyclic voltammetry in either sulfuric or perchloric acid solution or during the deposition of an UPD layer of copper at the gold surface. In all cases we obtain stable and reproducible results which demonstrate the very high sensitivity of the devices to sub-monolayer changes occurring at the gold electrode surface. The response of these integrated optoelectrochemical devices is discussed in terms of a numerical model for the propagation of light within the waveguide structure.
integrated optics, waveguides, surface plasmon resonance, chemical sensors
0301-7249
139-152
Abanulo, J.C.
a0169b5a-9faa-4f7f-bee1-674381bc4672
Harris, R.D.
e972b676-3335-44cd-b6e8-0dae17c550c3
Sheridan, A.K.
3744de9e-5516-4842-bb36-852702ded40a
Wilkinson, J.S.
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Bartlett, P.N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
Abanulo, J.C.
a0169b5a-9faa-4f7f-bee1-674381bc4672
Harris, R.D.
e972b676-3335-44cd-b6e8-0dae17c550c3
Sheridan, A.K.
3744de9e-5516-4842-bb36-852702ded40a
Wilkinson, J.S.
73483cf3-d9f2-4688-9b09-1c84257884ca
Bartlett, P.N.
d99446db-a59d-4f89-96eb-f64b5d8bb075

Abanulo, J.C., Harris, R.D., Sheridan, A.K., Wilkinson, J.S. and Bartlett, P.N. (2002) Waveguide surface plasmon resonance studies of surface reactions on gold electrodes. Faraday Discussions, 121, 139-152. (doi:10.1039/b111417b). (PMID:12227565)

Record type: Article

Abstract

We describe the fabrication and characterisation of gold-coated graded index channel waveguide sensors designed for simultaneous electrochemical and surface plasmon resonance studies. The active sensing electrode area is a thin gold film between 0.5 and 5 mm in length and 200 µm wide deposited on top of a 3 µm wide waveguide which forms one arm of a Y-junction while the other arm of the Y-junction serves as a reference. Using these devices we have measured simultaneously the changes in transmittance through the device whilst carrying out cyclic voltammetry in either sulfuric or perchloric acid solution or during the deposition of an UPD layer of copper at the gold surface. In all cases we obtain stable and reproducible results which demonstrate the very high sensitivity of the devices to sub-monolayer changes occurring at the gold electrode surface. The response of these integrated optoelectrochemical devices is discussed in terms of a numerical model for the propagation of light within the waveguide structure.

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e-pub ahead of print date: 23 May 2002
Published date: 2002
Keywords: integrated optics, waveguides, surface plasmon resonance, chemical sensors
Organisations: Optoelectronics Research Centre, Chemistry

Identifiers

Local EPrints ID: 260370
URI: http://eprints.soton.ac.uk/id/eprint/260370
ISSN: 0301-7249
PURE UUID: a01e7dcb-2e48-4cda-badd-04d3ee0b220d
ORCID for J.S. Wilkinson: ORCID iD orcid.org/0000-0003-4712-1697
ORCID for P.N. Bartlett: ORCID iD orcid.org/0000-0002-7300-6900

Catalogue record

Date deposited: 26 Jan 2005
Last modified: 18 Feb 2021 16:40

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Contributors

Author: J.C. Abanulo
Author: R.D. Harris
Author: A.K. Sheridan
Author: J.S. Wilkinson ORCID iD
Author: P.N. Bartlett ORCID iD

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