Fastier-Wooller, Jarred and Dinh, Toan 
ORCID: https://orcid.org/0000-0002-7489-9640 and Dau, Van Thanh and Dao, Dzung
(2019)
Soft ionic liquid multi-point touch sensor.
RSC Advances, 9 (19).
pp. 10733-10738.
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Text (Published Version)
c9ra00322c.pdf Available under License Creative Commons Attribution Non-commercial. Download (566kB) | Preview |
Abstract
The development of electronic skin (e-skin) and soft tactile sensing has recently attracted great interest. Here we report for the first time on a novel ionic liquid (IL) based soft pressure sensor with multi-point touch detection capability using 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM]+[BF4]−) as a highly conductive sensing medium. The sensing mechanism is attributed to the repopulation of charge cations and anions in aqueous solution under pressure. The sensor can detect two dimensional touching positions with a sensitivity of −0.28% kPa−1. Our sensor showed good stability and temperature independence thanks to the incompressibility of IL in the range of touch pressure and the appropriate signal measurement configuration. We successfully demonstrated the sensor's capability to detect multi-point human touch with different pressure levels. Our simple design with smart structures and ease of fabrication processes enable the development of a soft and low-cost sensor with multiple-point sensing capabilities on a single chip.
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| Item Type: | Article (Commonwealth Reporting Category C) |
|---|---|
| Refereed: | Yes |
| Item Status: | Live Archive |
| Faculty/School / Institute/Centre: | Historic - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 Jul 2013 - 31 Dec 2021) |
| Faculty/School / Institute/Centre: | Historic - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 Jul 2013 - 31 Dec 2021) |
| Date Deposited: | 29 Jul 2020 04:19 |
| Last Modified: | 22 Sep 2020 05:32 |
| Uncontrolled Keywords: | Tactile sensor; pressure; design; temperature; electronics; fabrication; sponge; array; skin |
| Fields of Research (2008): | 09 Engineering > 0913 Mechanical Engineering > 091306 Microelectromechanical Systems (MEMS) |
| Fields of Research (2020): | 40 ENGINEERING > 4017 Mechanical engineering > 401705 Microelectromechanical systems (MEMS) |
| Socio-Economic Objectives (2008): | E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering |
| Identification Number or DOI: | https://doi.org/10.1039/c9ra00322c |
| URI: | http://eprints.usq.edu.au/id/eprint/38157 |
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