2023
DOI: 10.1002/admt.202300436
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Printed Bilayer Liquid Metal Soft Sensors for Strain and Tactile Perception in Soft Robotics

Abstract: A liquid metal (LM) soft sensors for strain monitoring and self‐powered tactile detection in soft robotics are developed. The sensor is fabricated by printing a bilayer of oxidized LM paste and bare LM on a soft substrate. This bilayer design overcomes the challenges in scalable printing of liquid metal and demonstrates soft sensors with exceptional electromechanical performance. Specifically, the sensor exhibits a strain sensing range of over 400% with a gauge factor of over 2, while displaying low hysteresis… Show more

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Cited by 9 publications
(7 citation statements)
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“…The friction electric sensors essentially operate in four primary modes: contact separation mode (CS), lateral sliding mode (LS), single electrode mode (SE), and sliding independent friction electric layer mode (FS). Among them, The TENG in CS mode consists of two materials with contrasting triboelectric polarities, along with electrodes positioned on its rear side. Under external pressure, the TENG can sense changes in pressure more easily due to the contact electrification effect, where two materials come into contact with each other and thus generate a surface charge.…”
Section: Triboelectric Self-powered Sensorsmentioning
confidence: 99%
“…The friction electric sensors essentially operate in four primary modes: contact separation mode (CS), lateral sliding mode (LS), single electrode mode (SE), and sliding independent friction electric layer mode (FS). Among them, The TENG in CS mode consists of two materials with contrasting triboelectric polarities, along with electrodes positioned on its rear side. Under external pressure, the TENG can sense changes in pressure more easily due to the contact electrification effect, where two materials come into contact with each other and thus generate a surface charge.…”
Section: Triboelectric Self-powered Sensorsmentioning
confidence: 99%
“…It has a strain range of more than 400% and a gauge factor(GF) of more than 2. [ 97 ] On the other hand, poor sensitivity and repeatability are important factors that limit the application of flexible sensors. For the piezoresistive transduction mechanism, the sensitivity of the device can be improved by using structures such as micro‐pyramids, micro‐hair, and porous materials as active layers.…”
Section: Materials and Fabrication Of Flexible Sensorsmentioning
confidence: 99%
“…Reproduced with permission. [ 97 ] Copyright 2023, Wiley Online Library. c) Structural change in the behavior of the sensor under an external pressure; for increased pressure, the slightly touched contact spots are sufficiently touched and unconnected features connect, enhancing higher contact area.…”
Section: Materials and Fabrication Of Flexible Sensorsmentioning
confidence: 99%
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“…Wearable tactile sensors are gaining widespread attention and research in the Internet of Things (IoT), [ 1 ] soft robotics, [ 2–4 ] and human–machine interaction (HMI). [ 5–7 ] To enable direct interaction with the external environment, tactile sense is a crucial element.…”
Section: Introductionmentioning
confidence: 99%