Optoelectrochemical thin-film chlorine sensor employing evanescent fields
Optoelectrochemical thin-film chlorine sensor employing evanescent fields
A new type of optoelectrochemical sensor based on an electrochromic thin-film sensing layer placed on top of a planar waveguide has been developed. The oxidation state of the sensing film is quantitatively measured by the evanescent field of the light transmitted through the waveguide. The functioning of the device has been ascertained which dissolved chlorine, employing an electrochemically resettable film of lutetium biphthalocyanine. Detection of film oxidation has been carried out at 950 nm. This technique appears promising for the detection of residual chlorine, since only changes due to the sensing reaction are monitored. Although the device has not been optimized, a potential sensitivity below 1 ppm has been demonstrated. The integration of modem optical technology and electrochemical techniques for sensing applications appears to be a powerful new approach.
651-655
Piraud, Christophe
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Mwarania, Eustace
c4f4a0c3-316a-4619-902f-b010478ff3c7
Wylangowski, George
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Wilkinson, James S.
73483cf3-d9f2-4688-9b09-1c84257884ca
O'Dwyer, Kieran
5ceba4f3-e06b-4a2f-97ca-8b788563bec8
Schiffrin, David J.
9e52b03b-622d-4a73-99cd-05bd462b39fa
Piraud, Christophe
22e84877-cad3-4344-8878-220c54fbee2f
Mwarania, Eustace
c4f4a0c3-316a-4619-902f-b010478ff3c7
Wylangowski, George
e9b25be3-68a1-4bbb-9577-7ca253da4e22
Wilkinson, James S.
73483cf3-d9f2-4688-9b09-1c84257884ca
O'Dwyer, Kieran
5ceba4f3-e06b-4a2f-97ca-8b788563bec8
Schiffrin, David J.
9e52b03b-622d-4a73-99cd-05bd462b39fa
Piraud, Christophe, Mwarania, Eustace, Wylangowski, George, Wilkinson, James S., O'Dwyer, Kieran and Schiffrin, David J.
(1992)
Optoelectrochemical thin-film chlorine sensor employing evanescent fields.
Analytical Chemistry, 64 (6), .
(doi:10.1021/ac00030a015).
Abstract
A new type of optoelectrochemical sensor based on an electrochromic thin-film sensing layer placed on top of a planar waveguide has been developed. The oxidation state of the sensing film is quantitatively measured by the evanescent field of the light transmitted through the waveguide. The functioning of the device has been ascertained which dissolved chlorine, employing an electrochemically resettable film of lutetium biphthalocyanine. Detection of film oxidation has been carried out at 950 nm. This technique appears promising for the detection of residual chlorine, since only changes due to the sensing reaction are monitored. Although the device has not been optimized, a potential sensitivity below 1 ppm has been demonstrated. The integration of modem optical technology and electrochemical techniques for sensing applications appears to be a powerful new approach.
More information
e-pub ahead of print date: March 1992
Identifiers
Local EPrints ID: 78363
URI: http://eprints.soton.ac.uk/id/eprint/78363
ISSN: 0003-2700
PURE UUID: 31fb32c7-f6d9-4d9d-a059-f0fc50a43d89
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Date deposited: 11 Mar 2010
Last modified: 14 Mar 2024 02:32
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Contributors
Author:
Christophe Piraud
Author:
Eustace Mwarania
Author:
George Wylangowski
Author:
Kieran O'Dwyer
Author:
David J. Schiffrin
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