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Jeong, Hoon Eui
Multiscale Biomimetics & Manufacturing Lab
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  • Biomimetics

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Shear-pressure multimodal sensor based on flexible cylindrical pillar array and flat structured carbon nanocomposites with simple fabrication process

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Title
Shear-pressure multimodal sensor based on flexible cylindrical pillar array and flat structured carbon nanocomposites with simple fabrication process
Author
Jeong, ChangyoonKo, HangilJeong, Hoon EuiPark, Young-Bin
Issue Date
2019-11
Publisher
Elsevier Ltd
Citation
COMPOSITES SCIENCE AND TECHNOLOGY, v.184, pp.107841
Abstract
Measuring shear displacement and pressure simultaneously is essential for various applications, such as tactile sensors for robotic finger tips, shoe soles for gait monitoring, etc. We present a simple means of transducing shear displacement and pressure change to flexible composite sensor. The presented sensor consists of an array of cylindrical pillars standing on a flat substrate, which is composed of carbon nanotubes (CNTs) and polydimethylsiloxane. The sensing mechanism is based on changing CNT network in pillar and flat structure under shear and pressure. When a shear displacement change occurs in the pillar array, which transfers shear and pressure to flat structure in the sample, the CNT network in the sample is changed due to bending of the pillars. Under pressure, the load is transferred from the pillar array to flat structure inducing changes in relative resistance. Load transfer through this hierarchical structure enabled measurement of shear displacement and pressure up to 5 mm and 1200 kPa, respectively. Therefore, it shows great potential applications in monitoring or even recognizing various human physiological activities.
URI
https://scholarworks.unist.ac.kr/handle/201301/30461
URL
https://www.sciencedirect.com/science/article/pii/S0266353819318159?via%3Dihub
DOI
10.1016/j.compscitech.2019.107841
ISSN
0266-3538
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