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Integrated Multifunctional Flexible Electronics Based on Tough Supramolecular Hydrogels with Patterned Silver Nanowires

Abstract

Conductive hydrogels based soft electronics with superior mechanical/electrical properties and biocompatibility have great potentials for sensing and stimulation at device-human interfaces, in which one piece of functional gel is usually used as a multi-sensor to chemicals, mechanical deformations, etc. Also, it is important to develop a facile strategy for patterning intricate circuits and conductive components in a hydrogel system to afford integrated functions. Demonstrated here is a hybrid conductive hydrogel system that can be facilely patterned and integrated with complex circuits, which enables monitoring of multiple signals, including tensile strain, out-of-plane pressure, and temperature. The conductive hydrogel was fabricated by a stencil-aided printing of percolated silver nanowires (AgNWs) on a tough supramolecular hydrogel with robust interfacial bonding. The obtained hydrogel-based electronics exhibited remarkable electrical and mechanical properties, with a sheet resistance of 0.76 Ω/sq, breaking strain over 600%, breaking stress up to 3.3 MPa, and self-healing ability, superior to most existing conductive hydrogels. The strain sensors exhibited a gauge factor up to 58.2, enabling monitoring various subtle human motions. Multiple sensing units can be facilely fabricated in such an approach using a well-designed silhouetted mask. The powerful functions of the integrated electronics were manifested by the detection of complex stress or temperature fields.

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Supplementary files

Article information


Submitted
27 Feb 2020
Accepted
18 May 2020
First published
20 May 2020

J. Mater. Chem. C, 2020, Accepted Manuscript
Article type
Paper

Integrated Multifunctional Flexible Electronics Based on Tough Supramolecular Hydrogels with Patterned Silver Nanowires

F. Zhu, S. Y. Zheng, J. Lin, Z. L. Wu, J. Yin, J. Qian, S. Qu and Q. Zheng, J. Mater. Chem. C, 2020, Accepted Manuscript , DOI: 10.1039/D0TC01011A

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