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Proceedings Paper

A highly sensitive pressure sensor using conductive composite elastomers with wavy structures
Author(s): Rujie Sun; Xiao-Chong Zhang; Jonathan Rossiter; Fabrizio Scarpa
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Paper Abstract

Flexible pressure sensors are crucial components for the next generation wearable devices to monitor human physiological conditions. In this paper, we present a novel resistive pressure sensor based on hybrid composites made from carbon nanotube (CNT) for the conductive coating layer and polydimethylsiloxane (PDMS) elastomers as the substrate. The high sensitivity of these sensors is attributed to the change of contact resistance caused by the variation of the contact areas between the wavy film and the electrodes. Porous electrodes were designed to increase the roughness of the interfaces, thus further enhancing the pressure sensitivity. The developed device was verified through a series of tests, and the sensor exhibited a high sensitivity of 2.05 kPa-1 under a low pressure of 35.6 Pa.

Paper Details

Date Published: 13 May 2016
PDF: 6 pages
Proc. SPIE 9863, Smart Biomedical and Physiological Sensor Technology XIII, 98630Z (13 May 2016); doi: 10.1117/12.2229775
Show Author Affiliations
Rujie Sun, Univ. of Bristol (United Kingdom)
Xiao-Chong Zhang, Univ. of Bristol (United Kingdom)
Jonathan Rossiter, Univ. of Bristol (United Kingdom)
Fabrizio Scarpa, Univ. of Bristol (United Kingdom)

Published in SPIE Proceedings Vol. 9863:
Smart Biomedical and Physiological Sensor Technology XIII
Brian M. Cullum; Douglas Kiehl; Eric S. McLamore, Editor(s)

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