A sensor circuit using reference-based conductance switching in organic electrochemical transistors
2008 (English)In: Applied Physics Letters, ISSN 0003-6951, Vol. 93, no 20, 203301- p.Article in journal (Refereed) Published
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.
electrochemical sensors, electrolytes, organic semiconductors, transistors
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-16168DOI: 10.1063/1.2975377OAI: oai:DiVA.org:liu-16168DiVA: diva2:133258