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Title: Sensors based on organic thin film transistors
Authors: Yan, F 
Mok, SM
Lin, P
Chan, HLW 
Issue Date: 2008
Source: ECS transactions, 2008, v. 16, no. 9, p. 355-364
Abstract: Organic thin-film transistors (OTFT) are excellent candidates for the application on disposable sensors due to their potentially low-cost and easy fabrication process. Two types of OTFT-based sensors have been studied. One is light sensitive phototransistor based on the composite of poly(3-hexylthiophene) and Ti02 nanoparticles. The device shows a quick change of channel current under light exposure, which can be attributed to a positive shift of the threshold voltage induced by accumulated electrons trapped by the Ti02 nanoparticles in the channel. Another one is for sensing DNA hybridization. Both single and double strand DNA molecules are immobilized on the surface of the Au source/drain electrodes of different devices, inducing a dramatic change in the performance of the OTFTs. Single strand DNA and double strand DNA are differentiated successfully in the experiments indicating that this is a promising technique for sensing DNA hybridization without labeling.
Publisher: Electrochemical Society
Journal: ECS transactions 
ISBN: 9781566776554
ISSN: 1938-5862
EISSN: 1938-6737
DOI: 10.1149/1.2980574
Description: Thin Film Transistors 9, TFT 9 - 214th ECS Meeting, Honolulu, HI, 13-16 October 2008
Appears in Collections:Conference Paper

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