CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, China.
School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore.
Nat Commun. 2018 Sep 19;9(1):3813. doi: 10.1038/s41467-018-06079-3.
The development of ultrasensitive, anti-jamming, and durable sensors that can precisely distinguish different human body motions are of great importance for smart health monitoring and diagnosis. Physical implementation of such flexible sensors is still a challenge at the moment. Combining the designs of advanced material showing excellent electrochemical properties with the facilitative structure engineering, high-performance flexible sensors that satisfy both signal detecting and recognition requirements may be made possible. Here we report the first metal-organic framework-based strain sensor with accurate signal detection and noise-screening properties. Upon doping the tricarboxytriphenyl amine-based metal-organic framework nanofilm with iodine, the two-terminal device exhibits ultrahigh sensitivity with a gauge factor exceeding 10,000 in the 2.5% to 3.3% deformation range for over 5000 dynamic operating cycles and out-of-scale noise-screening capability. The high-performance strain sensor can easily differentiate the moderate muscle hyperspasmia from subtle swaying and vigorous sporting activities.
对于智能健康监测和诊断而言，开发能够精确区分不同人体运动的超灵敏、抗干扰且耐用的传感器具有重要意义。目前，这种柔性传感器的物理实现仍然具有挑战性。将具有优异电化学性能的先进材料设计与便利的结构工程相结合，可能制造出满足信号检测和识别要求的高性能柔性传感器。在这里，我们报告了第一个基于金属-有机骨架的应变传感器，它具有精确的信号检测和噪声屏蔽性能。在掺杂三羧酸三苯胺基金属-有机骨架纳米薄膜时，该两端器件在 2.5%至 3.3%的变形范围内具有超过 10000 的超高灵敏度，在超过 5000 个动态工作循环中具有超过 10000 的超高灵敏度，并具有超出比例的噪声屏蔽能力。高性能应变传感器可以轻松区分中度肌肉抽搐与细微的摇摆和剧烈的体育活动。
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