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Mesocellular Foam-Modified Water-Gated Organic Field Effect Transistor Enzyme Biosensors for Chlorpyrifos Detection

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In this study, bottom-contact spherical siliceous mesocellular foam (MCF) modified water-gated organic field effect transistors (OFETs) were fabricated in order to detect Chlorpyrifos pesticide in water. Interdigitated electrodes with varied channel width-to-length ratios (W/L) were fabricated and IV characteristics of the OFETs were measured. It was found that although, in theory, increasing W/L would improve electrical performance of the OFETs, but in experiments the OFETs are no longer saturated beyond an optimum W/L. To detect Chlorpyrifos pesticide, gold and MCFmodified gold electrodes were used as OFET gates. Acetylcholinesterase enzyme was immobilized onto MCF in order to improve the Chlorpyrifos detection. After characterization of the OFETs, an optimum structure having ten pairs of interdigitated electrodes and W/L ratio of 2060 was used to assess the performance of the pesticide biosensors.
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Keywords: ENZYME BIOSENSORS; ORGANIC FIELD EFFECT TRANSISTORS; PESTICIDE; WATER-GATED

Document Type: Research Article

Publication date: October 1, 2016

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  • Journal of Nanoelectronics and Optoelectronics (JNO) is an international and cross-disciplinary peer reviewed journal to consolidate emerging experimental and theoretical research activities in the areas of nanoscale electronic and optoelectronic materials and devices into a single and unique reference source. JNO aims to facilitate the dissemination of interdisciplinary research results in the inter-related and converging fields of nanoelectronics and optoelectronics.
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