Ultra-stretchable and highly sensitive strain sensor based on gradient structure carbon nanotubes

High stretchability and sensitivity of strain sensors are two properties that are very difficult to combine together into one material, due to the intrinsic dilemma of the opposite requirements of robustness of the conductive network. Therefore, the improvement of one property is always achieved at...

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Bibliographic Details
Published in:Nanoscale 2018-01, Vol.1 (28), p.13599-1366
Main Authors: Liang, Binghao, Lin, Zhiqiang, Chen, Wenjun, He, Zhongfu, Zhong, Jing, Zhu, Hai, Tang, Zikang, Gui, Xuchun
Format: Article
Language:English
Subjects:
Carbon nanotubes
Dynamic tests
Linearity
Nanotubes
Sensitivity
Sensors
Stretchability
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Summary:High stretchability and sensitivity of strain sensors are two properties that are very difficult to combine together into one material, due to the intrinsic dilemma of the opposite requirements of robustness of the conductive network. Therefore, the improvement of one property is always achieved at the expense of decreasing the other property, and preventing its practical application. Inspired by the micro-structure of the copolymer, which consists of stretchable amorphous and strong crystal domains, we developed a highly stretchable and sensitive strain sensor, based on innovative gradient carbon nanotubes (CNTs). By integrating randomly oriented and well aligned CNTs, acting as sensitive and stretchable conductive elements, respectively, into a continuous changing structure, our strain sensors successfully combine both a high sensitivity (gauge factor (GF) = 13.5) and ultra-stretchability (>550%). With a fast response speed (
ISSN:2040-3364
2040-3372
DOI:10.1039/c8nr02528b