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Self‐Healing, Adhesive, and Highly Stretchable Ionogel as a Strain Sensor for Extremely Large Deformation
Author(s) -
Zhang Li Mei,
He Yuan,
Cheng Sibo,
Sheng Hao,
Dai Keren,
Zheng Wen Jiang,
Wang Mei Xiang,
Chen Zhen Shan,
Chen Yong Mei,
Suo Zhigang
Publication year - 2019
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201804651
Subject(s) - nanocomposite , materials science , durability , self healing , deformation (meteorology) , gauge factor , nanotechnology , composite material , adhesive , reliability (semiconductor) , soft robotics , computer science , fabrication , artificial intelligence , robot , medicine , power (physics) , alternative medicine , physics , pathology , layer (electronics) , quantum mechanics
Fabricating a strain sensor that can detect large deformation over a curved object with a high sensitivity is crucial in wearable electronics, human/machine interfaces, and soft robotics. Herein, an ionogel nanocomposite is presented for this purpose. Tuning the composition of the ionogel nanocomposites allows the attainment of the best features, such as excellent self‐healing (>95% healing efficiency), strong adhesion (347.3 N m −1 ), high stretchability (2000%), and more than ten times change in resistance under stretching. Furthermore, the ionogel nanocomposite–based sensor exhibits good reliability and excellent durability after 500 cycles, as well as a large gauge factor of 20 when it is stretched under a strain of 800–1400%. Moreover, the nanocomposite can self‐heal under arduous conditions, such as a temperature as low as −20 °C and a temperature as high as 60 °C. All these merits are achieved mainly due to the integration of dynamic metal coordination bonds inside a loosely cross‐linked network of ionogel nanocomposite doped with Fe 3 O 4 nanoparticles.