Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/28695
Title: Highly sensitive dopamine biosensors based on organic electrochemical transistors
Authors: Tang, H
Lin, P
Chan, HLW 
Yan, F 
Keywords: Dopamine
Multi-walled carbon nanotubes
Organic electrochemical transistor
Organic thin film transistor
PEDOT:PSS
Issue Date: 2011
Publisher: Elsevier
Source: Biosensors and bioelectronics, 2011, v. 26, no. 11, p. 4559-4563 How to cite?
Journal: Biosensors and bioelectronics 
Abstract: Organic electrochemical transistors (OECTs) based on poly(3,4-ethylenedioxythiophene):poly(styrene sulfonic acid) (PEDOT:PSS) with different gate electrodes, including graphite, Au and Pt electrode, etc., have been used as dopamine sensor for the first time. The sensitivity of the OECT to dopamine depends on its gate electrode and operation voltage. We find that the device with a Pt gate electrode characterized at the gate voltage of 0.6. V shows the highest sensitivity. The detection limit of the device to dopamine is lower than 5. nM, which is one order of magnitude better than a conventional electrochemical measurement with the same Pt electrode. It is expected that OECT is a good candidate for low cost and highly sensitive biosensor for the detection of dopamine.
URI: http://hdl.handle.net/10397/28695
ISSN: 0956-5663
EISSN: 1873-4235
DOI: 10.1016/j.bios.2011.05.025
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