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3D Printable High Performance Conducting Polymer Hydrogel for All-Hydrogel Bioelectronics

Tao Zhou, View ORCID ProfileHyunwoo Yuk, Faqi Hu, Jingjing Wu, Fajuan Tian, Heejung Roh, Zequn Shen, Guoying Gu, Jingkun Xu, Baoyang Lu, Xuanhe Zhao
doi: https://doi.org/10.1101/2022.01.29.478311
Tao Zhou
1Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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Hyunwoo Yuk
1Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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  • For correspondence: hyunwoo@mit.edu luby@jxstnu.edu.cn zhaox@mit.edu
Faqi Hu
2Flexible Electronics Innovation Institute, Jiangxi Science and Technology Normal University, Nanchang, 330013, China
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Jingjing Wu
1Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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Fajuan Tian
2Flexible Electronics Innovation Institute, Jiangxi Science and Technology Normal University, Nanchang, 330013, China
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Heejung Roh
1Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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Zequn Shen
3Robotics Institute, School of Mechanical Engineering, State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, 200240, China
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Guoying Gu
3Robotics Institute, School of Mechanical Engineering, State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, 200240, China
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Jingkun Xu
2Flexible Electronics Innovation Institute, Jiangxi Science and Technology Normal University, Nanchang, 330013, China
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Baoyang Lu
2Flexible Electronics Innovation Institute, Jiangxi Science and Technology Normal University, Nanchang, 330013, China
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  • For correspondence: hyunwoo@mit.edu luby@jxstnu.edu.cn zhaox@mit.edu
Xuanhe Zhao
1Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
4Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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  • For correspondence: hyunwoo@mit.edu luby@jxstnu.edu.cn zhaox@mit.edu
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Abstract

Owing to the unique combination of electrical conductivity and tissue-like mechanical properties, conducting polymer hydrogels have emerged as a promising candidate for bioelectronic interfacing with biological systems. However, despite the recent advances, the development of hydrogels with both excellent electrical and mechanical properties in physiological environments remains a lingering challenge. Here, we report a bi-continuous conducting polymer hydrogel (BC-CPH) that simultaneously achieves high electrical conductivity (over 11 S cm-1), stretchability (over 400%) and fracture toughness (over 3,300 J m-2) in physiological environments, and is readily applicable to advanced fabrication methods including 3D printing. Enabled by the BC-CPH, we further demonstrate multi-material 3D printing of monolithic all-hydrogel bioelectronic interfaces for long-term electrophysiological recording and stimulation of various organs. This study may offer promising materials and a platform for future bioelectronic interfacing.

Competing Interest Statement

The authors have declared no competing interest.

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Posted January 29, 2022.
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3D Printable High Performance Conducting Polymer Hydrogel for All-Hydrogel Bioelectronics
Tao Zhou, Hyunwoo Yuk, Faqi Hu, Jingjing Wu, Fajuan Tian, Heejung Roh, Zequn Shen, Guoying Gu, Jingkun Xu, Baoyang Lu, Xuanhe Zhao
bioRxiv 2022.01.29.478311; doi: https://doi.org/10.1101/2022.01.29.478311
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3D Printable High Performance Conducting Polymer Hydrogel for All-Hydrogel Bioelectronics
Tao Zhou, Hyunwoo Yuk, Faqi Hu, Jingjing Wu, Fajuan Tian, Heejung Roh, Zequn Shen, Guoying Gu, Jingkun Xu, Baoyang Lu, Xuanhe Zhao
bioRxiv 2022.01.29.478311; doi: https://doi.org/10.1101/2022.01.29.478311

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