Abstract
Excellent flexibility, rapid response and high sensitivity are key parameters of strain sensor that can sustain and detect various deformations including stretching, bending and torsion. Developing organic/inorganic nanostructured composites with improved electromechanical performance is still a great challenge due to the instability in the combination and the fragility of inorganic nanomaterials. Herein, we report a newtype strain sensor based on poly(vinylidene fluoride–trifluoro-ethylene) nanofibers/ZnO nanowires composites, taking advantage of electrospinning and hydrothermal process. The as-fabricated device exhibits a high flexibility, ultrafast response and remarkable sensitivity with a gauge factor of 4.59. Especially, it has the capability to detect various stimulations including mechanical deformations such as stretching and bending. The device can easily detect muscle movements like finger bending and straightening.
摘要
优异的柔性、快速的响应能力和高的灵敏度为应变传感器提供了能够承受和检测拉伸、弯曲和扭曲等多种形变的能力. 利用有机-无机复合材料来提高应变传感器的机电性能依然面临着很大的挑战, 主要是由于无机材料的脆性以及与有机材料复合时的结构不稳定性. 本文利用静电纺丝与水热技术制备了一种基于P(VDF-TrFE)纳米纤维和ZnO纳米线的复合结构的新型应变传感器. 所研制的应变器件表现出极高的柔韧性, 超快的响应速度和极高的灵敏度(其应变系数高达4.59). 特别是它还具备能够检测多种力学形变如拉伸、弯曲的能力. 此外本文所研制的传感器还能够轻易地探测肌肉运动, 如手指的弯曲与伸直等.
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Shuai Chen received his MSc degree from Qingdao University in 2015. Now he is a PhD candidate at the School of Mathematics and Physics, University of Science and Technology Beijing. His research interest focuses on flexible sensors.
Di Chen is a professor at the School of Mathematics and Physics, University of Science and Technology Beijing. She received her BSc degree from Anhui Normal University in 1999 and PhD degree from the University of Science and Technology of China in 2005. Her current research interest is the advanced technology for designing nanostructure for sustainable energy applications, including energy storage and photocatalysts. She has published about 100 papers in international referred journals, including Advanced Materials, Advanced Functional Materials, Nano Letters, ACS Nano, etc.
Guozhen Shen received his BSc degree in 1999 from Anhui Normal University and PhD degree in 2003 from the University of Science and Technology of China. From 2004 to 2009, he conducted his research in Hanyang University (Korea), National Institute for Materials Science (Japan), University of Southern California (USA) and Huazhong University of Science and technology. He joined the Institute of Semiconductors, Chinese Academy of Sciences as a professor in 2013. His current research focuses on flexible electronics and printable electronics, including transistors, photodetectors, sensors and flexible energy-storage devices.
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Chen, S., Lou, Z., Chen, D. et al. Highly flexible strain sensor based on ZnO nanowires and P(VDF-TrFE) fibers for wearable electronic device. Sci. China Mater. 59, 173–181 (2016). https://doi.org/10.1007/s40843-016-0128-8
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DOI: https://doi.org/10.1007/s40843-016-0128-8