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Sensors 2009, 9(12), 9896-9902; doi:10.3390/s91209896
Article

All-Plastic Electrochemical Transistor for Glucose Sensing Using a Ferrocene Mediator

1, 1, 1, 1, 1, 2,3 and 1,3,*
1 Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA 2 Biomedical Engineering, Cornell University, Ithaca, NY 14853, USA 3 Centre Microélectronique de Provence, Ecole Nationale Supérieure des Mines de Saint Etienne, 13541 Gardanne, France
* Author to whom correspondence should be addressed.
Received: 19 October 2009 / Revised: 25 November 2009 / Accepted: 27 November 2009 / Published: 4 December 2009
(This article belongs to the Section Biosensors)
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Abstract

We demonstrate a glucose sensor based on an organic electrochemical transistor (OECT) in which the channel, source, drain, and gate electrodes are made from the conducting polymer poly(3,4-ethylenedioxythiophene) doped with poly(styrene sulfonate) (PEDOT:PSS). The OECT employs a ferrocene mediator to shuttle electrons between the enzyme glucose oxidase and a PEDOT:PSS gate electrode. The device can be fabricated using a one-layer patterning process and offers glucose detection down to the micromolar range, consistent with levels present in human saliva.
Keywords: organic electrochemical transistor; glucose sensor; ferrocene mediator organic electrochemical transistor; glucose sensor; ferrocene mediator
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Shim, N.Y.; Bernards, D.A.; Macaya, D.J.; DeFranco, J.A.; Nikolou, M.; Owens, R.M.; Malliaras, G.G. All-Plastic Electrochemical Transistor for Glucose Sensing Using a Ferrocene Mediator. Sensors 2009, 9, 9896-9902.

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