Soft ionic liquid multi-point touch sensor

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.

[img]
Preview
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.


Statistics for USQ ePrint 38157
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 Jul 2013 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 Jul 2013 -)
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

Actions (login required)

View Item Archive Repository Staff Only