Smart bandage with inductor-capacitor resonant tank based printed wireless pressure sensor on electrospun Poly-L-lactide nanofibers

Nikbakhtnasrabadi, F. , Hosseini, E. S., Dervin, S., Shakthivel, D. and Dahiya, R. (2022) Smart bandage with inductor-capacitor resonant tank based printed wireless pressure sensor on electrospun Poly-L-lactide nanofibers. Advanced Electronic Materials, 8(7), 210348. (doi: 10.1002/aelm.202101348)

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Easy to use multifunctional wearable devices, with no wires hanging around, are needed for real time health monitoring at user's comfort. Herein, an inductor-capacitor (LC) resonant tank-based wireless pressure sensor, screen-printed on an electrospun Poly-L-lactide (PLLA) nanofibers-based flexible, biocompatible, and piezoelectric substrate is presented. The printed resonant tank (resonant frequency of ≈13.56 MHz) consists of a planar inductor connected in parallel with an interdigitated capacitor. The capacitance, of the interdigitated capacitor present on the piezoelectric substrate varies in response to applied pressure. As a result, the resonant frequency changes and the LC tank works as a wireless pressure sensor. The sensor exhibited high sensitivity 0.035 kP−1 and 1200 Hz kPa−1 in wireless operation with excellent durability (over 1800 cycles). The sensitivity is the highest (1.75-fold higher) among printed wireless pressure sensors reported so far. Finally, the presented LC tank-based pressure sensor is integrated on a compression bandage to demonstrate its potential use in the online monitoring of sub-bandage pressure. The application of optimum pressure by the bandage, together with the electroceutical arrangement facilitated by the piezoelectric PLLA substrate, can accelerate the cell regeneration and hence wound healing.

Item Type:Articles
Additional Information:This work was supported in part by Engineering and Physical Sciences Research Council through Engineering Fellowship for Growth (EP/R029644/1) and North West Centre for Advanced Manufacturing project funded by the European Union's INTERREG programme (H2020-Intereg-IVA5055), managed by the Special EU Programmes Body.
Glasgow Author(s) Enlighten ID:Nikbakhtnasrabadi, Dr Fatemeh and Dahiya, Professor Ravinder and Shakthivel, Dr Dhayalan and Dervin, Miss Saoirse
Authors: Nikbakhtnasrabadi, F., Hosseini, E. S., Dervin, S., Shakthivel, D., and Dahiya, R.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Advanced Electronic Materials
ISSN (Online):2199-160X
Published Online:19 February 2022
Copyright Holders:Copyright © 2022 The Authors
First Published:First published in Advanced Electronic Materials 8(7): 210348
Publisher Policy:Reproduced under a Creative Commons Licence

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
301728Engineering Fellowships for Growth: Printed Tactile SKINRavinder DahiyaEngineering and Physical Sciences Research Council (EPSRC)EP/R029644/1ENG - Electronics & Nanoscale Engineering