Mechano-regulated metal–organic framework nanofilm for ultrasensitive and anti-jamming strain sensing

• Main Authors: Pan, Liang, Liu, Gang, Shi, Wenxiong, Shang, Jie, Leow, Wan Ru, Liu, Yaqing, Jiang, Ying, Li, Shuzhou, Chen, Xiaodong, Li, Run-Wei
• Other Authors: School of Materials Science & Engineering
• Format: Article
• Language: English
• Published: 2019
• Subjects: Strain Sensing; DRNTU::Engineering::Materials; Metal–organic Framework Nanofilm
• Online Access: https://hdl.handle.net/10356/81310; http://hdl.handle.net/10220/47485
• Institution: Nanyang Technological University

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.