Textile-Based Potentiometric Electrochemical pH Sensor for Wearable Applications
AbstractIn this work, we present a potentiometric pH sensor on textile substrate for wearable applications. The sensitive (thick film graphite composite) and reference electrodes (Ag/AgCl) are printed on cellulose-polyester blend cloth. An excellent adhesion between printed electrodes allow the textile-based sensor to be washed with a reliable pH response. The developed textile-based pH sensor works on the basis of electrochemical reaction, as observed through the potentiometric, cyclic voltammetry (100 mV/s) and electrochemical impedance spectroscopic (10 mHz to 1 MHz) analysis. The electrochemical double layer formation and the ionic exchanges of the sensitive electrode-pH solution interaction are observed through the electrochemical impedance spectroscopic analysis. Potentiometric analysis reveals that the fabricated textile-based sensor exhibits a sensitivity (slope factor) of 4 mV/pH with a response time of 5 s in the pH range 6–9. The presented sensor shows stable response with a potential of 47 ± 2 mV for long time (2000 s) even after it was washed in tap water. These results indicate that the sensor can be used for wearable applications. View Full-Text
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Manjakkal, L.; Dang, W.; Yogeswaran, N.; Dahiya, R. Textile-Based Potentiometric Electrochemical pH Sensor for Wearable Applications. Biosensors 2019, 9, 14.
Manjakkal L, Dang W, Yogeswaran N, Dahiya R. Textile-Based Potentiometric Electrochemical pH Sensor for Wearable Applications. Biosensors. 2019; 9(1):14.Chicago/Turabian Style
Manjakkal, Libu; Dang, Wenting; Yogeswaran, Nivasan; Dahiya, Ravinder. 2019. "Textile-Based Potentiometric Electrochemical pH Sensor for Wearable Applications." Biosensors 9, no. 1: 14.
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