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Sensors 2017, 17(11), 2621; doi:10.3390/s17112621

Wearable Wide-Range Strain Sensors Based on Ionic Liquids and Monitoring of Human Activities

1
College of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, China
2
Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
*
Authors to whom correspondence should be addressed.
Received: 11 October 2017 / Revised: 8 November 2017 / Accepted: 9 November 2017 / Published: 14 November 2017
(This article belongs to the Section Physical Sensors)
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Abstract

Wearable sensors for detection of human activities have encouraged the development of highly elastic sensors. In particular, to capture subtle and large-scale body motion, stretchable and wide-range strain sensors are highly desired, but still a challenge. Herein, a highly stretchable and transparent stain sensor based on ionic liquids and elastic polymer has been developed. The as-obtained sensor exhibits impressive stretchability with wide-range strain (from 0.1% to 400%), good bending properties and high sensitivity, whose gauge factor can reach 7.9. Importantly, the sensors show excellent biological compatibility and succeed in monitoring the diverse human activities ranging from the complex large-scale multidimensional motions to subtle signals, including wrist, finger and elbow joint bending, finger touch, breath, speech, swallow behavior and pulse wave. View Full-Text
Keywords: wearable; wide-range; strain sensor; ionic liquids wearable; wide-range; strain sensor; ionic liquids
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Zhang, S.-H.; Wang, F.-X.; Li, J.-J.; Peng, H.-D.; Yan, J.-H.; Pan, G.-B. Wearable Wide-Range Strain Sensors Based on Ionic Liquids and Monitoring of Human Activities. Sensors 2017, 17, 2621.

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