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Published in

The Electrochemical Society, ECS Transactions, 12(98), p. 41-46, 2020

DOI: 10.1149/09812.0041ecst

ECS Meeting Abstracts, 66(MA2020-02), p. 3380-3380, 2020

DOI: 10.1149/ma2020-02663380mtgabs

ECS Meeting Abstracts, 27(MA2020-01), p. 1879-1879, 2020

DOI: 10.1149/ma2020-01271879mtgabs

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Sensitive Detection of Glyphosate By a Water-Gated Organic Transistor

Journal article published in 2020 by Koichiro Asano, Yui Sasaki ORCID, Tsukuru Minamiki ORCID, Tsuyoshi Minami ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

In this study, we developed a glyphosate (GlyP) sensor based on a water-gated organic field-effect transistor (WG-OFET). The WG-OFET has a side-gated structure, which is easier to fabricate compared to the conventional multi-stacked OFET structure. A carboxylate-functionalized polythiophene (PT) was employed as the organic semiconductor and receptor, which enabled a competitive assay among PT, Cu2+, and GlyP in water. The WG-OFET sensor achieved highly sensitive and selective detection (i.e. limit of detection = 0.26 ppm), which was lower than the maximum approved GlyP level (0.7 ppm) in drinking water in the United States. This study demonstrates the promising potential of WG-OFET as an electronic sensor device for the detection of analytes in aqueous media.