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)

Abstract

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.
• Status: Published
• Refereed: Yes
• 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
• Publisher: Wiley
• ISSN: 2199-160X
• 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

Project Code	Award No	Project Name	Principal Investigator	Funder's Name	Funder Ref	Lead Dept
301728		Engineering Fellowships for Growth: Printed Tactile SKIN	Ravinder Dahiya	Engineering and Physical Sciences Research Council (EPSRC)	EP/R029644/1	ENG - Electronics & Nanoscale Engineering