Self-Healable Hydrogel-Liquid Metal Composite Platform Enabled by a 3D Printed Stamp for a Multimodular Sensor System

被引：79

作者：

Choi, Yoon Young ^{[2
]}

Ho, Dong Hae ^{[2
]}

Cho, Jeong Ho ^{[1
]}

机构：

[1] Yonsei Univ, Dept Chem & Biomol Engn, Seoul 03722, South Korea

[2] Sungkyunkwan Univ, SKKU Adv Inst Nanotechnol SAINT, Suwon 16419, South Korea

来源：

ACS APPLIED MATERIALS & INTERFACES | 2020年 / 12卷 / 08期

关键词：

liquid metal; hydrogel; sensor; biosignal detection; healable electronics; DOUBLE NETWORK HYDROGELS; ROBUST;

D O I：

10.1021/acsami.9b22676

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Hydrogels and liquid metals have been emerging as potential materials for use in self-healing electronics. This paper presents a simple fabrication procedure for a custom-designed hydrogel liquid metal composite and its various applications. The hydrogel is patterned using three-dimensional printed molds for creating an electrical pathway, which is subsequently filled with liquid metal. The lifetime and self-healing property of the hydrogel improve drastically through coating of its surface with a moisture protectant layer and via the formation of an oxidized layer of liquid metal, respectively. Three joined units of the resulting hydrogel-liquid metal composite are successfully applied as self-healable electrodes in a sensor system consisting of a photoresistor, a thermistor, and a tilt switch. The composite is also used as an electrode for biosignal (electromyogram, electrocardiogram, and electrodermal activity) detection, and its sensing ability is found to be comparable to that of a conventional Ag/AgCl electrode. The demonstrated hydrogel-liquid metal composite provides wide scope for researchers to achieve practical advances in self-healing electronics.

引用

页码：9824 / 9832

页数：9

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