Heterogeneous self-healing assembly of MXene and graphene oxide enables producing free-standing and self-reparable soft electronics and robots

[Display omitted] Self-healing materials (SHMs) with unique mechanical and electronic properties are promising for self-reparable electronics and robots. However, the self-healing ability of emerging two-dimensional (2D) materials, for instance, MXenes, has not been systematically investigated, whic...

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Bibliographic Details
Published in:Science bulletin (Beijing) 2022-03, Vol.67 (5), p.501-511
Main Authors: Ma, Jia-Nan, Zhang, Yong-Lai, Liu, Yu-Qing, Han, Dong-Dong, Mao, Jiang-Wei, Zhang, Jia-Rui, Zhao, Wu-Chao, Sun, Hong-Bo
Format: Article
Language:English
Subjects:
Graphene oxide
MXene
Self-healing
Soft electronics
Soft robots
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Summary:[Display omitted] Self-healing materials (SHMs) with unique mechanical and electronic properties are promising for self-reparable electronics and robots. However, the self-healing ability of emerging two-dimensional (2D) materials, for instance, MXenes, has not been systematically investigated, which limits their applications in self-healing electronics. Herein, we report the homogeneous self-healing assembly (homo-SHA) of MXene and the heterogeneous self-healing assembly (hetero-SHA) of MXene and graphene oxide (GO) under moisture treatments. The self-healing mechanism has been attributed to the hydration induced interlayer swelling of MXene and GO and the recombination of hydrogen bond networks after water desorption. The multiform hetero-SHA of MXene and GO not only enables facile fabrication of free-standing soft electronics and robots, but also endows the resultant devices with damage-healing properties. As proof-of-concept demonstrations, free-standing soft electronic devices including a generator, a humidity sensor, a pressure sensor, and several robotic devices have been fabricated. The hetero-SHA of MXene and GO is simple yet effective, and it may pioneer a new avenue to develop miniature soft electronics and robots based on 2D materials.
ISSN:2095-9273
DOI:10.1016/j.scib.2021.11.015