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. 2018 Jul 23;18(7):2395. doi: 10.3390/s18072395

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Characterization of the pressure sensing performance of the flexible ionic liquid super-capacitive pressure sensor. (a) The capacitance changes with driving frequency sweep from 20 Hz to 1.5 KHz at 0 KPa and 10 KPa, respectively. (b) Relative rate of change in capacitance of the sensor as a function of different pressure. The inset shows that the relative rate of change in capacitance of low pressure region A. (c) Relationship of the change in capacitance of the sensor attached on a circular tube and pressure applied. The inset shows the actual sensor attached on the circular tube. (d) The relationship of pressure and capacitance of the sensor cyclically compressed by 10 KPa. (e) The capacitance variation of the sensor under a square shaped pressure applied.