Journal
SENSORS
Volume 9, Issue 12, Pages 9896-9902Publisher
MDPI AG
DOI: 10.3390/s91209896
Keywords
organic electrochemical transistor; glucose sensor; ferrocene mediator
Funding
- Center for Nanoscale Systems
- National Science Foundation
- New York State Office of Science, Technology & Academic Research
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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.
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