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Proceedings Paper

New spectroelectrochemical sensor
Author(s): Yining Shi; Andrew F. Slaterbeck; Saroj Aryal; Carl J. Seliskar; William R. Heineman; Thomas H. Ridgway; Joseph H. Nevin
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Paper Abstract

A new type of spectroelectrochemical sensor that embodies tow modes of instrumental selectivity in addition to selective partitioning through an applied film barrier is described. The sensor consists of a planar optical substrate/electrode coated with a chemically-selective film. SEnsing is based on the change in the attenuation of light passing through the guided wave substrate which accompanies a chemical reaction of an analyte induced by electromodulation. Threefold selectivity for a chosen analyte relative to other environmental components is obtained by the choice of coating material, the electrolysis potential, and the wavelength for optical monitoring. The sensor concept is demonstrated with an indium tin oxide coated glass guided wave device that has been over-coated with a sol-gel derive charge-selective thin film. One such selective coating used was a charge-selective sol-gel processed Nafion-SiO2 composite film. Prototype analytes have been used to demonstrate that the change in the transmittance of the waveguide resulting from electrochemical oxidation/reduction can be used to quantify an analyte.

Paper Details

Date Published: 26 March 1998
PDF: 10 pages
Proc. SPIE 3258, Micro- and Nanofabricated Structures and Devices for Biomedical Environmental Applications, (26 March 1998); doi: 10.1117/12.304388
Show Author Affiliations
Yining Shi, Univ. of Cincinnati (United States)
Andrew F. Slaterbeck, Univ. of Cincinnati (United States)
Saroj Aryal, Univ. of Cincinnati (United States)
Carl J. Seliskar, Univ. of Cincinnati (United States)
William R. Heineman, Univ. of Cincinnati (United States)
Thomas H. Ridgway, Univ. of Cincinnati (United States)
Joseph H. Nevin, Univ. of Cincinnati (United States)

Published in SPIE Proceedings Vol. 3258:
Micro- and Nanofabricated Structures and Devices for Biomedical Environmental Applications
Paul Lee Gourley, Editor(s)

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