Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 181, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2019.05.017
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Funding
- Natural Science Foundation of China [NSFC-21573162, 21603166, 201605116, 21773172, WIBEZD2014001-02]
- Wenzhou Public Welfare Science and Technology Project [S20170015]
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We report a facile, low cost and readily scalable method for the fabrication of a flexible paper-based strain sensor. Approaches of pen-writing, paper-transferring and elastomer-packaging were exploited to build a strain sensor with layered structures consisting of the graphene mesh and conductive polyaniline. The normalized conductivity change (Delta G/G(0)) and gauge factor could reach as high as 747 and 1.1 x 10 4 , respectively. The mechanism of ultra-high conductivity change was attributed to the formation of micro-disconnection and micro-cracking in the layered structure deduced by Raman imaging and a simulation based on equivalent resistor networks. As a proof of the concept, the strain devices were finally exploited in sign language recognition. Our work demonstrated a new strategy to create ultra-high sensitive communication devices for people with speech and hearing impairment.
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