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Waveguide surface plasmon resonance sensing: Electrochemical desorption of alkane thiol monolayers

Sheridan, A.K., Ngamukot, P., Bartlett, P.N. and Wilkinson, J.S. (2006) Waveguide surface plasmon resonance sensing: Electrochemical desorption of alkane thiol monolayers Sensors and Actuators B: Chemical, 117, (1), pp. 253-260.

Record type: Article


Combined electrochemical and planar waveguide surface plasmon resonance measurements demonstrating the oxidative desorption through cyclic voltammetry in acid of an alkane thiol monolayer from a gold film are presented in this paper. We show that the thiol film can be systematically removed and we investigate the oxidative mechanism using both a gold wire and evaporated gold on Pyrex surfaces. For the latter we use a combined planar waveguide surface plasmon resonance (SPR) and electrochemical sensor, where the gold pad acts as both the sensing area for SPR measurements and the electrode for electrochemical investigations. The results show a linear relationship between the fractional coverage of the gold electrode and the transmission measured using SPR, and these results are compared to the results of a numerical simulation. This sensing configuration shows promise both for combined electrochemical and optical biosensing and for electrically addressed patterning of biosensor surfaces.

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Published date: September 2006


Local EPrints ID: 46899
ISSN: 0925-4005
PURE UUID: ea600235-79b5-45ac-846f-210ca968acc3
ORCID for J.S. Wilkinson: ORCID iD

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Date deposited: 23 Jul 2007
Last modified: 29 Sep 2017 18:48

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Author: A.K. Sheridan
Author: P. Ngamukot
Author: P.N. Bartlett
Author: J.S. Wilkinson ORCID iD

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