Escobedo, P. , Bhattacharjee, M. , Nikbakhtnasrabadi, F. and Dahiya, R. (2021) Smart bandage with wireless strain and temperature sensors and battery-less NFC tag. IEEE Internet of Things Journal, 8(6), pp. 5093-5100. (doi: 10.1109/JIOT.2020.3048282)
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Abstract
This paper presents a smart bandage with wireless strain and temperature sensors and a battery-less Near Field Communication tag. Both sensors are based on conductive poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) polymer. The highly sensitive strain sensor consists of a microfluidic channel filled with PEDOT:PSS in Polydimethylsiloxane (PDMS) substrate. The strain sensor shows 3 order ( 1250) increase in the resistance for 10% strain and considerably high gauge factor of 12500. The sensor was tested for 30% strain, which is more than typical stretching of human skin or body parts such as chest expansion during respiration. The strain sensor was also tested for different bending and the electrical resolution was 150% per degree of free bending and 12k% per percentage of stretching. The resistive temperature sensor, fabricated on a Polyvinyl Chloride (PVC) substrate, showed a 60% decrease in resistance when the temperature changed from 25.C to 85.C and a sensitivity of 1% per.C. As a proof of concept, the sensors and NFC tag were integrated on wound dressing to obtain wearable systems with smart bandage form-factor. The sensors can be operated and read from distance of 25 mm with a user-friendly smartphone application developed for powering the system as well as real-time acquisition of sensors data. Finally, we demonstrate the potential use of smart bandage in healthcare applications such as assessment of wound status or respiratory diseases such as asthma and COVID-19, where monitoring via wearable strain (e.g., respiratory volume) and temperature sensors is critical.
| Item Type: | Articles |
|---|---|
| Additional Information: | This work was supported in part by Engineering and Physical Sciences Research Council (EPSRC) through Engineering Fellowship for Growth (EP/R029644/1), and North West Centre for Advanced Manufacturing (NW CAM) project supported by the European Union’s INTERREG VA Programme (H2020-Intereg-IVA5055), managed by the Special EU Programmes Body (SEUPB). |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Nikbakhtnasrabadi, Dr Fatemeh and Bhattacharjee, Mr Mitradip and Escobedo, Dr Pablo and Dahiya, Professor Ravinder |
| Authors: | Escobedo, P., Bhattacharjee, M., Nikbakhtnasrabadi, F., and Dahiya, R. |
| College/School: | College of Science and Engineering College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
| Journal Name: | IEEE Internet of Things Journal |
| Publisher: | IEEE |
| ISSN: | 2327-4662 |
| ISSN (Online): | 2327-4662 |
| Published Online: | 30 December 2020 |
| Copyright Holders: | Copyright © 2020 The Authors |
| First Published: | First published in IEEE Internet of Things Journal 8(6): 5093-5100 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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