A glucose sensor based on an organic electrochemical transistor structure using a vapor polymerized poly(3,4-ethylenedioxythiophene) layer

Yuna Kim, Jaekwon Do, Jeonghun Kim, Sang Yoon Yang, George G. Malliaras, Christopher K. Ober, Eunkyoung Kim

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

A glucose sensor based on an organic electrochemical transistor (OECT) structure was prepared by vapor phase polymerization (VPP) of 3,4ethylenedioxythiophene (EDOT). The poly(3,4-ethylenedioxythiophene) (PEDOT) film was introduced as the conducting polymer channel and a platinum wire was used as a gate electrode in the OECT. The redox enzyme glucose oxidase (GOx) was introduced into the electrolyte of the OECT. The sensitivity and detection range of the sensor could be tuned by adjusting the source-drain and gate bias. The OECT showed high sensitivity to glucose in the low concentration region below 10μM An acid sensitive fluorescent layer was easily coated on top of the vapor polymerized PEDOT to obtain a double-layered OECT sensor. The optical sensitivity of the double-layered OECT sensor correlated linearly with the electrochemical sensitivity. Furthermore, the fluorescence intensity change of the double-layered OECT sensor was linearly dependent on pH, providing the OECT sensor with dual sensitivity of electrochemical and optical sensitivity.

Original languageEnglish
Article number01AE10
JournalJapanese Journal of Applied Physics
Volume49
Issue number1 Part 2
DOIs
Publication statusPublished - 2010 Apr 19

Fingerprint

Glucose sensors
glucose
Transistors
transistors
Vapors
vapors
sensors
sensitivity
Sensors
Glucose oxidase
oxidase
Conducting polymers
conducting polymers
Glucose
enzymes
Platinum
low concentrations
platinum
Enzymes
polymerization

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Kim, Yuna ; Do, Jaekwon ; Kim, Jeonghun ; Yang, Sang Yoon ; Malliaras, George G. ; Ober, Christopher K. ; Kim, Eunkyoung. / A glucose sensor based on an organic electrochemical transistor structure using a vapor polymerized poly(3,4-ethylenedioxythiophene) layer. In: Japanese Journal of Applied Physics. 2010 ; Vol. 49, No. 1 Part 2.
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A glucose sensor based on an organic electrochemical transistor structure using a vapor polymerized poly(3,4-ethylenedioxythiophene) layer. / Kim, Yuna; Do, Jaekwon; Kim, Jeonghun; Yang, Sang Yoon; Malliaras, George G.; Ober, Christopher K.; Kim, Eunkyoung.

In: Japanese Journal of Applied Physics, Vol. 49, No. 1 Part 2, 01AE10, 19.04.2010.

Research output: Contribution to journalArticle

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