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Issue 2, 2014
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Organic electrochemical transistors with graphene-modified gate electrodes for highly sensitive and selective dopamine sensors

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Abstract

Organic electrochemical transistors (OECTs) are successfully used as highly sensitive and selective dopamine sensors. The selectivity of the OECT-based dopamine sensors is significantly improved by coating biocompatible polymer Nafion or chitosan on the surface of the gate electrodes. The interference induced by uric acid and ascorbic acid is effectively eliminated especially after the modification of Nafion. The sensitivity of the devices is improved by graphene flakes co-modified on the gate electrodes. The detection limit of the devices to dopamine is down to 5 nM, which is much lower than that of conventional electrochemical approaches. Because the OECT-based dopamine sensors are solution processable, they are suitable for low-cost and disposable sensing application.

Graphical abstract: Organic electrochemical transistors with graphene-modified gate electrodes for highly sensitive and selective dopamine sensors

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Publication details

The article was received on 02 Aug 2013, accepted on 26 Oct 2013 and first published on 21 Nov 2013


Article type: Paper
DOI: 10.1039/C3TB21079K
Citation: J. Mater. Chem. B, 2014,2, 191-200
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    Organic electrochemical transistors with graphene-modified gate electrodes for highly sensitive and selective dopamine sensors

    C. Liao, M. Zhang, L. Niu, Z. Zheng and F. Yan, J. Mater. Chem. B, 2014, 2, 191
    DOI: 10.1039/C3TB21079K

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