Ultra-flexible biodegradable pressure sensitive field effect transistors for hands-free control of robot movements

Paul, A., Yogeswaran, N. and Dahiya, R. (2022) Ultra-flexible biodegradable pressure sensitive field effect transistors for hands-free control of robot movements. Advanced Intelligent Systems, 4(11), 2200183. (doi: 10.1002/aisy.202200183)

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Sensitive flexible pressure sensors are needed in applications such as health monitoring, robotics, and wearable systems. Herein, crumpled graphene flakes network (c-GFN) channel based highly sensitive pressure sensing field effect transistors (PRESSFETs) are presented. The solution-processed PRESSFET devices are developed on ultrathin (≈3 μm thick) biodegradable graphene oxide–chitosan (GO–CS) substrate. The distinctive crumpled morphology of GFN leads to a bandgap of 800 meV, which allows the device to have clear ON and OFF electronic states and low subthreshold swing. The presented device can work over a dynamic pressure range (0.5–2 kPa), while exhibiting good electrical stability and repeatability during rapid switching. The application of the presented device is demonstrated by attaching them to the temple regions of the face and pressing them with flexure and relaxation of respective temporalis muscles for hands-free control of the movements of a robotic device. The pressure sensing device turns ON when the facial temporalis muscle is flexed and returns to the OFF state when it is relaxed. Finally, the degradability of the devices is presented to demonstrate their easy disposability and potential for zero electronic waste.

Item Type:Articles
Additional Information:This work was supported in part by the Engineering and Physical Sciences Research Council (EPSRC) throughEngineering Fellowships for Growth (EP/R029644/1) and Heteroprint Programme Grant (EP/R03480X/1) and Academy of Medical Sciences through Newton International Fellowship (NF161567).
Glasgow Author(s) Enlighten ID:Yogeswaran, Mr Nivasan and Dahiya, Professor Ravinder and Paul, Dr Ambarish
Authors: Paul, A., Yogeswaran, N., and Dahiya, R.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Advanced Intelligent Systems
ISSN (Online):2640-4567
Published Online:29 September 2022
Copyright Holders:Copyright © 2022 The Authors
First Published:First published in Advanced Intelligent Systems 4(11): 2200183
Publisher Policy:Reproduced under a Creative Commons License

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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
301327`Hetero-print: A holistic approach to transfer-printing for heterogeneous integration in manufacturingPeter SkabaraEngineering and Physical Sciences Research Council (EPSRC)EP/R03480X/1ENG - Electronics & Nanoscale Engineering