Textile-based potentiometric electrochemical pH sensor for wearable applications

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)

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:Dahiya, Professor Ravinder and Dang, Ms Wenting and Manjakkal, Dr Libu and Yogeswaran, Mr Nivasan
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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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
3042180Postharvest Loss Monitoring for Improved Food SecurityRavinder DahiyaRoyal Academy of Engineering (RAE)FoESFt5\100025ENG - Electronics & Nanoscale Engineering
663861Engineering Fellowships for Growth: Printed Tactile SKINRavinder DahiyaEngineering and Physical Sciences Research Council (EPSRC)EP/M002527/1ENG - ENGINEERING ELECTRONICS & NANO ENG
3017280Engineering Fellowships for Growth: Printed Tactile SKINRavinder DahiyaEngineering and Physical Sciences Research Council (EPSRC)EP/R029644/1ENG - Electronics & Nanoscale Engineering