Real-Time Detection of Glyphosate by a Water-Gated Organic Field-Effect Transistor with a Microfluidic Chamber

被引：16

作者：

Asano, Koichiro ^{[1
]}

Didier, Pierre ^{[1
,2
]}

Ohshiro, Kohei ^{[1
]}

Lobato-Dauzier, Nicolas ^{[1
,2
]}

Genot, Anthony J. ^{[1
,2
]}

Minamiki, Tsukuru ^{[1
]}

Fujii, Teruo ^{[1
,2
]}

Minami, Tsuyoshi ^{[1
,2
]}

机构：

[1] Univ Tokyo, Inst Ind Sci, Tokyo 1538505, Japan

[2] Univ Tokyo, LIMMS CNRS IIS UMI2820, Tokyo 1538505, Japan

来源：

LANGMUIR | 2021年 / 37卷 / 24期

基金：

日本学术振兴会;

关键词：

SENSORS; IDENTIFICATION;

D O I：

10.1021/acs.langmuir.1c00511

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

This paper reports the development of a real-time monitoring system utilizing the combination of a water-gated organic field-effect transistor (WG-OFET) and a microfluidic chamber for the detection of the herbicide glyphosate (GlyP). For the realization of the real-time sensing with the WG-OFET, the surface of a polymer semiconductor was utilized as a sensing unit. The aqueous solution including the target analyte, which is employed as a gate dielectric of the WG-OFET, flows into a designed microfluidic chamber on the semiconductor layer and the gate electrode. As the sensing mechanism, the WG-OFET-based sensor utilizes the competitive complexation among carboxylate-functionalized polythiophene, a copper(II) (Cu2+) ion, and GlyP. The reversible accumulation and desorption of the positively charged Cu2+ ion on the semiconductor surface induced a change in the electrical double-layer capacitance (EDLC). The optimization of the microfluidic chamber enables a uniform water flow and contributes to real-time quantitative sensing of GIyP at a micromolar level. Thus, this study would lead to practical real-time sensing in water for various fields including environmental assessment.

引用

页码：7305 / 7311

页数：7

共 60 条

[1] Benzothiadiazoles and dipyrrolyl quinoxalines with extended conjugated chromophores-fluorophores and anion sensors [J].