Multifunctional electronic skin with a stack of temperature and pressure sensor arrays

Kumaresan, Y. , Ozioko, O. and Dahiya, R. (2021) Multifunctional electronic skin with a stack of temperature and pressure sensor arrays. IEEE Sensors Journal, (doi: 10.1109/JSEN.2021.3055458) (Early Online Publication)

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This paper presents multifunctional electronic skin (e-Skin) with a stack of pressure and temperature sensors arrays. The pressure sensor layer comprises of an 8x 8 array of capacitive sensors using soft elastomers as the dielectric medium and the temperature sensing layer comprises of 4 x4 array of conductive polymers based resistive sensors. Three variants of capacitive pressure sensors were developed using two different dielectric materials (PDMS and Ecoflex) to find the best combination of performance and softness. The Ecoflex-based pressure sensor showed high sensitivity (~4.11 kPa-1) at a low-pressure regime (<1 kPa) and the 7.5:1 PDMS based pressure sensor showed high sensitivity (~2.32 kPa-1) in the high-pressure regime (>1 kPa). Two variants of temperature sensors were fabricated using CNT and CNT & PEDOT:PSS conducting polymer composite and their performance compared. Finally, a highly sensitive CNT+PEDOT:PSS based resistive temperature sensors layer was integrated on top of 7.5:1 PDMS based capacitive pressure sensors layer to realize the e-Skin prototype. The developed e-Skin is capable of sensing pressures greater than 10 kPa with a high sensitivity of ~2.32 kPa-1 at 1 kPa and temperatures with the sensitivity of ~ 0.64 (%)/(°C) up to 80°C, thus demonstrating high potential for use in robotics and touch based interactive systems.

Item Type:Articles
Status:Early Online Publication
Glasgow Author(s) Enlighten ID:Dahiya, Professor Ravinder and Kumaresan, Dr Yogeenth and Ozioko, Mr Oliver
Authors: Kumaresan, Y., Ozioko, O., and Dahiya, R.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:IEEE Sensors Journal
ISSN (Online):1558-1748
Published Online:28 January 2021
Copyright Holders:Copyright © 2021 The Authors
First Published:First published in IEEE Sensors Journal 2021
Publisher Policy:Reproduced under a Creative Commons License

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