AI Article Synopsis
- - This study describes a real-time monitoring system designed to detect the herbicide glyphosate using a water-gated organic field-effect transistor (WG-OFET) combined with a microfluidic chamber.
- - The sensor works by utilizing a polymer semiconductor that interacts with glyphosate, copper ions, and other materials to change electrical properties, allowing for precise measurements in an aqueous solution.
- - The microfluidic chamber is optimized to ensure consistent water flow, enabling accurate detection of glyphosate at low concentrations, which could be valuable for environmental monitoring and assessment.
Article Abstract
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) (Cu) ion, and GlyP. The reversible accumulation and desorption of the positively charged Cu 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 GlyP at a micromolar level. Thus, this study would lead to practical real-time sensing in water for various fields including environmental assessment.
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| http://dx.doi.org/10.1021/acs.langmuir.1c00511 | DOI Listing |
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