Manjakkal, L. , Dang, W., Yogeswaran, N. and Dahiya, R. (2019) Textile-based potentiometric electrochemical pH sensor for wearable applications. Biosensors, 9(1), 14. (doi: 10.3390/bios9010014) (PMID:30654478)
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Abstract
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.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Yogeswaran, Mr Nivasan and Dahiya, Professor Ravinder and Dang, Ms Wenting and Manjakkal, Dr Libu |
| Creator Roles: | Manjakkal, L.Formal analysis, Writing – original draft Dahiya, R.Writing – original draft, Supervision |
| Authors: | Manjakkal, L., Dang, W., Yogeswaran, N., and Dahiya, R. |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
| Journal Name: | Biosensors |
| Publisher: | MDPI |
| ISSN: | 2079-6374 |
| ISSN (Online): | 2079-6374 |
| Published Online: | 16 January 2019 |
| Copyright Holders: | Copyright © 2019 The Authors |
| First Published: | First published in Biosensors 9(1): 14 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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