Textile-based dual-mode organic electrochemical transistors for lactate biosensing

Abstract：The dual-modeorganic electrochemical transistors (OECT) were successfully assembled onfabric. The property of different devices has been compared. In the depletionmode, the PEDOT: PSS/textile-based OECT exhibit high transconductance of 75 mS, and the switching ratio of 8 × 10².   In accumulation mode, the PEDOT:PSS/DETA/ textile-based OECT exhibit transconductance of 0.55 mS, switchingratio can reach 31.7. Both modes have good cycle stability. A lactate (LA)sensor was prepared by modifying the gate electrode with lactate oxidase. Thesensitivity of the sensor is 69.97 mV/decade and 47.8 mV/decade in thedepletion and accumulation mode, respectively. The LA sensor in both modes hasgood linear response in a wide concentration range of 100 pM-10 mM. The sensorhas been successfully applied to the detection of   LA in sweat sample. It hasthe advantages of simple preparation, good performance, and convenient integrationinto clothes, which provides a feasible platform for intelligent wearable andportable medical detection.

Tao, Yang, et al."Textile-based dual-mode organic electrochemical transistors for lactatebiosensing." Materials Science and Engineering: B 290(2023): 116356.