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A sensor circuit using reference-based conductance switching in organic electrochemical transistors
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
Acreo AB.
Linköping University, Department of Electrical Engineering. Linköping University, The Institute of Technology.
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.ORCID iD: 0000-0001-5154-0291
2008 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 93, no 20, 203301- p.Article in journal (Refereed) Published
Abstract [en]

Using organic electrochemical transistors as sensors, the sample-receptor reaction often induces moderate changes only in the drain current dynamics as the gate voltage level is switched. Here, we report an electrochemical sensor circuit including electrochemical transistors based on poly(3,4-ethylenedioxythiophene) doped with polystyrenesulfonate that puts out a static sensor response signal. The circuit includes a sample and a reference transistor that are both driven in the resistive mode at 0.1 V. Measurements were performed on aqueous salt electrolytes ranging from 100 to 500 mM concentrations. The signal-ON sensor circuit provides a tenfold increase in the sensitivity as compared to single transistor sensors.

Place, publisher, year, edition, pages
2008. Vol. 93, no 20, 203301- p.
Keyword [en]
electrochemical sensors, electrolytes, organic semiconductors, transistors
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-16168DOI: 10.1063/1.2975377OAI: oai:DiVA.org:liu-16168DiVA: diva2:133258
Available from: 2009-01-08 Created: 2009-01-07 Last updated: 2017-12-14

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Svensson, Per-OlofForchheimer, RobertBerggren , Magnus

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