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Issue 45, 2017
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High-performance wearable strain sensors based on fragmented carbonized melamine sponges for human motion detection

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Abstract

Strain sensors with a large strain sensing range and high sensitivity are in high demand due to their various potential applications ranging from human motion detection to soft robotics. In this study, high-performance strain sensors are developed by fragmenting carbonized melamine sponges that are commercially available. The strain sensors, based on fragmented carbonized melamine sponges (FCMS), demonstrate high sensitivity with a gauge factor (GF) of 18.7 at an FCMS density of 1.07 mg cm−2 and a large strain sensing range of up to 80%. As a comparison, the strain sensor based on unfragmented carbonized melamine sponges has only a GF of ∼8.0 and limited stretchability (<7%). In situ tension tests indicate that the strain-response mechanism of the sensor is mainly ascribed to the reorientation of individual FCMS at low strains (<40%), while crack propagation dominates the strain-response behavior of the sensor at strains larger than 40%. The high sensitivity and large strain sensing range of the sensor, as well as the low-cost and scalable fabrication method, enable diverse applications. It can not only detect large-strain human arthrosis movements, but it also exhibits the capability to monitor subtle human physiological activity.

Graphical abstract: High-performance wearable strain sensors based on fragmented carbonized melamine sponges for human motion detection

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Publication details

The article was received on 10 Aug 2017, accepted on 19 Oct 2017 and first published on 20 Oct 2017


Article type: Paper
DOI: 10.1039/C7NR05903E
Citation: Nanoscale, 2017,9, 17948-17956
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    High-performance wearable strain sensors based on fragmented carbonized melamine sponges for human motion detection

    X. Fang, J. Tan, Y. Gao, Y. Lu and F. Xuan, Nanoscale, 2017, 9, 17948
    DOI: 10.1039/C7NR05903E

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