Flexible tactile sensors using screen printed P(VDF-TrFE) and MWCNT/PDMS composites

Khan, S., Dahiya, R. , Tinku, S. and Lorenzelli, L. (2015) Flexible tactile sensors using screen printed P(VDF-TrFE) and MWCNT/PDMS composites. IEEE Sensors Journal, 15(6), pp. 3146-3155. (doi: 10.1109/JSEN.2014.2368989)

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This work presents and compares two different types of screen printed flexible and conformable pressure sensors arrays. In both variants, the flexible pressure sensors are in the form of segmental arrays of parallel plate structure - sandwiching the piezoelectric polymer Polyvinylidene Fluoride Trifluoroethylene (P(VDF-TrFE)) between two printed metal layers of silver (Ag) in one case and the piezoresistive (Multiwall Carbon Nanotube (MWCNT) mixed with Poly(dimethylsiloxane (PDMS)) layer in the other. Each sensor module consists of 4×4 sensors array with 1×1 mm2 sensitive area of each sensor. The screen printed piezoelectric sensors array exploits the change in polarization level of P(VDF-TrFE) to detect dynamic tactile parameter such as contact force. Similarly, the piezoresistive sensors array exploits the change in resistance of the bulk printed layer of MWCNT/PDMS composite. The two variants are compared on the basis of fabrication by printing on plastic substrate, ease of processing and handling of the materials, compatibility of the dissimilar materials in multilayers structure, adhesion and finally according to the response to the normal compressive forces. The foldable pressure sensors arrays are completely realized using screen-printing technology and are targeted towards realizing low-cost electronic skin.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Dahiya, Professor Ravinder
Authors: Khan, S., Dahiya, R., Tinku, S., and Lorenzelli, L.
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:26 November 2014
Copyright Holders:Copyright © 2014 The Authors
First Published:First published in IEEE Sensors Journal 15(6):3146-3155
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
663861Engineering Fellowships for Growth: Printed Tactile SKINRavinder DahiyaEngineering & Physical Sciences Research Council (EPSRC)EP/M002527/1ENG - ENGINEERING ELECTRONICS & NANO ENG