Bioinspired Dual-Mode Stretchable Strain Sensor Based on Magnetic Nanocomposites for Strain/Magnetic Discrimination |
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Authors: | Xiaohui Guo Weiqiang Hong Yunong Zhao Tong Zhu Long Liu Hongjin Li Ziwei Wang Dandan Wang Zhihong Mai Tianxu Zhang Jinyang Yang Fengzhe Zhang Yun Xia Qi Hong Yaohua Xu Feng Yan Ming Wang Guozhong Xing |
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Affiliation: | 1. Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education, School of Integrated Circuits, Anhui University, Hefei, 230601 China;2. Key Laboratory of Microelectronic Devices & Integrated Technology, Institute of Microelectronics, University of the Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100029 China;3. Hubei JiuFengShan Laboratory, Future Science and Technology City, Wuhan, Hubei, 420000 China;4. Bengbu Zhengyuan Electronics Technology Co., Ltd, Bengbu, 233000 China;5. Department of Metallurgical and Materials Engineering, The University of Alabama, Tuscaloosa, AL, 35487 USA;6. Frontier Institute of Chip and System, Fudan University, Shanghai, 200433 China |
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Abstract: | Recently, flexible stretchable sensors have been gaining attention for their excellent adaptability for electronic skin applications. However, the preparation of stretchable strain sensors that achieve dual-mode sensing while still retaining ultra-low detection limit of strain, high sensitivity, and low cost is a pressing task. Herein, a high-performance dual-mode stretchable strain sensor (DMSSS) based on biomimetic scorpion foot slit microstructures and multi-walled carbon nanotubes (MWCNTs)/graphene (GR)/silicone rubber (SR)/Fe3O4 nanocomposites is proposed, which can accurately sense strain and magnetic stimuli. The DMSSS exhibits a large strain detection range (≈160%), sensitivity up to 100.56 (130–160%), an ultra-low detection limit of strain (0.16% strain), and superior durability (9000 cycles of stretch/release). The sensor can accurately recognize sign language movement, as well as realize object proximity information perception and whole process information monitoring. Furthermore, human joint movements and micro-expressions can be monitored in real-time. Therefore, the DMSSS of this work opens up promising prospects for applications in sign language pose recognition, non-contact sensing, human-computer interaction, and electronic skin. |
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Keywords: | bionic dual-mode magnetic nanocomposites stretchable strain sensors ultra-low detection limit |
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