Integrated opposite charge grafting induced ionic-junction fiber

Yi Xing, Mingjie Zhou, Yueguang Si, Chi-Yuan Yang, Liang-Wen Feng, Qilin Wu, Fei Wang, Xiaomin Wang, Wei Huang, Yuhua Cheng, Ruilin Zhang, Xiaozheng Duan, Jun Liu, Ping Song, Hengda Sun, Hongzhi Wang, Jiayi Zhang, Su Jiang, Meifang Zhu and Gang Wang ()
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Yi Xing: Donghua University
Mingjie Zhou: Fudan University
Yueguang Si: Fudan University
Chi-Yuan Yang: Linköping University
Liang-Wen Feng: Sichuan University
Qilin Wu: Donghua University
Fei Wang: Fudan University
Xiaomin Wang: Fudan University
Wei Huang: University of Electronic Science and Technology of China
Yuhua Cheng: University of Electronic Science and Technology of China
Ruilin Zhang: Chinese Academy of Sciences
Xiaozheng Duan: Chinese Academy of Sciences
Jun Liu: National Key Laboratory on Electromagnetic Environmental Effects and Eletro-optical Engineering
Ping Song: National Key Laboratory on Electromagnetic Environmental Effects and Eletro-optical Engineering
Hengda Sun: Donghua University
Hongzhi Wang: Donghua University
Jiayi Zhang: Fudan University
Su Jiang: Fudan University
Meifang Zhu: Donghua University
Gang Wang: Donghua University

Nature Communications, 2023, vol. 14, issue 1, 1-11

Abstract: Abstract The emergence of ionic-junction devices has attracted growing interests due to the potential of serving as signal transmission and translation media between electronic devices and biological systems using ions. Among them, fiber-shaped iontronics possesses a great advantage in implantable applications owing to the unique one-dimensional geometry. However, fabricating stable ionic-junction on curved surfaces remains a challenge. Here, we developed a polyelectrolyte based ionic-junction fiber via an integrated opposite charge grafting method capable of large-scale continuous fabrication. The ionic-junction fibers can be integrated into functions such as ionic diodes and ionic bipolar junction transistors, where rectification and switching of input signals are implemented. Moreover, synaptic functionality has also been demonstrated by utilizing the fiber memory capacitance. The connection between the ionic-junction fiber and sciatic nerves of the mouse simulating end-to-side anastomosis is further performed to realize effective nerve signal conduction, verifying the capability for next-generation artificial neural pathways in implantable bioelectronics.

Date: 2023
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DOI: 10.1038/s41467-023-37884-0

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