期刊
BIOSENSORS-BASEL
卷 9, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/bios9010014
关键词
pH sensor; e-textile; potentiometric; graphite; wearable system
资金
- Frontiers of Engineering for Development Seed Funding by The Royal Academy of Engineering [FoESFT5/100025/304218-01]
- EPSRC [EP/M002527/1, EP/R029644/1]
- EPSRC [EP/R029644/1, EP/M002527/1] Funding Source: UKRI
In 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.
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