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PANI-Based Wearable Electrochemical Sensor for real time Sweat pH Monitoring
Sekar Madhu(세카르 마두),Md. Sajjad Alam(Md. 사자드 알람),Jungil Choi(최정일) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Sweat pH is an important health indicator related to metabolism and homeostasis level over hydrogen ion concentration in biological bio-fluid. Therefore, increasing research efforts have been motivated to develop wearable pH sensors towards continuous non-invasive monitoring of sweat pH values. A textile based skin-mounted microfluidic potentiometric device for electrochemical monitoring of pH in sweat is presented. The fabricated Polyaniline (PANI) incorporated carbon cloth (CC) pH sensor was tested in the range from 4 to 7, showing good behavior, with a sensitivity of 64.4 mV/pH, very close to a Nernstian response, better repeatability and good ion selectivity. Finally, a real sweat sample was collected, and the sweat pH was quantified with both the proposed sensor and a commercial pH meter, showing an excellent concordance. This soft skin-worn platform integrates potentiometric measurement, microfluidic technologies with flexible electronics for real-time wireless data transmission to mobile devices. The proposed device paves the way to build a novel practical fitness and health monitoring systems for improving practical fitness of human in real-time.