Journal
NANO LETTERS
Volume 20, Issue 5, Pages 3449-3458Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.0c00372
Keywords
flexible strain sensor; vanadium nitride; carbon nanotube; human-machine interaction; signal monitoring
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Funding
- National Natural Science Foundation of China [51872139]
- NSF of Jiangsu Province [BK20170045]
- Recruitment Program of Global Experts [1211019]
- Six Talent Peak Project of Jiangsu Province [XCL-043]
- Natural Science Basic Research Program of Shaanxi [2019JLM-28]
- Fundamental Research Funds for the Central Universities
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Flexible strain sensors have been widely investigated with their rapid development in human-machine interfaces, soft robots, and medical care monitoring. Here, we report a new in situ catalytic strategy toward the fabrication of metallic aerogel hybrids, which are composed of vanadium nitride (VN) nanosheets decorated with well-defined vertically aligned carbon nanotube arrays (VN/CNTs) for the first time. In this architecture, the two-dimensional VN nanosheets as the main bone structure are favorable for the flexible devices due to their excellent structural compatibility during the repetitive deforming process. In addition, the sandwiched aerogel hybrids form highly conductive 3D network, affording outstanding sensitivity for the strain-responsive behaviors. Further, the VN/CNTs-based flexible strain sensors are successfully fabricated, showing a high gauge factor of 386 within a small strain of 10%, fast response, and extraordinary durability. The monitoring of physical signals and an actual real-time human-machine controlling system based on the sensors are also presented.
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