Highly Sensitive Vitamin-C Sensors using the Laser-patterned PEDOT:PSS films
발표자
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초록
내용
The monitoring of biologically significant analytes is crucial for managing personal nutrition and physiology. However, these analytes are present at very low concentrations in body fluids, necessitating cost-effective sensors for the expeditious detection of biomolecules. In this study, we devised a highly sensitive biosensor based on organic electrochemical transistors (OECTs) with a conductive PEDOT:PSS film as both the channel and gate electrodes. Especially, we utilized high-power IR laser irradiation to micropattern all-PEDOT:PSS OECTs and transferred the devices from glass to a flexible PET substrate to create an epidermal sensor for vitamin-C. The fabricated OECT indicated a sensitivity slope of 317 μA dec-1 and a limit of detection of 5.5 μM, demonstrating sufficient performance for vitamin-C measurement in both human and food. These epidermal sensors were used to obtain temporal changes in vitamin-C concentration in the sweat of human volunteers after consuming a vitamin-C drink.