Self-adhesive electronic skin for ultra-sensitive healthcare monitoring

Due to their excellent mechanical properties and high tensile strain sensitivity, conductive hydrogels show great potential applications in the fields of artificial intelligence and human-machine interaction. The integration of reliable resilience, excellent viscosity and high strain sensitivity is...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2023-03, Vol.11 (1), p.4977-4986
Main Authors: Chen, Anbang, Zhang, Jiayu, Zhu, Jundong, Yan, Zhen, Wu, Qirui, Han, Songjiu, Huang, Jianren, Guan, Lunhui
Format: Article
Language:English
Subjects:
Adhesion
Artificial intelligence
Carbon nanotubes
Elastic layers
Electronic devices
Electronic equipment
Glycerol
Graphene
Health care
Hydrogels
Hydrogen bonding
Hydrogen bonds
Mechanical properties
Modulus of elasticity
Monitoring
Nanotechnology
Nanotubes
Pigskins
Resilience
Sensitivity
Skin
Tensile strain
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Summary:Due to their excellent mechanical properties and high tensile strain sensitivity, conductive hydrogels show great potential applications in the fields of artificial intelligence and human-machine interaction. The integration of reliable resilience, excellent viscosity and high strain sensitivity is a great challenge for conductive hydrogels. Here, inspired by human skin with a layered structure, glycerol was first introduced into a dual-network structure to prepare a hydrogel with hydrogen bonds, endowing the hydrogels with high resilience and adhesion. A mixture of graphene oxide and carbon nanotubes was sprayed on the hydrogel as a conductive layer to achieve high strain sensing. Then, a hydrogel with good toughness and high resilience was prepared by in situ polymerization as an elastic layer. Benefitting from its unique crack response mechanism, the integrated sensor showed high sensitivity (gauge factor = 20). Additionally, it presented a wide strain range (0-300%), super adhesion (56.9 N m −1 ) to pigskin with similar elastic modulus to the human body, and low hysteresis. This study provides a feasible solution for the improvement of wearable electronic devices for healthcare monitoring. Inspired by human skin, a versatile wearable sensor based on hydrogels and graphene oxide/carbon nanotube (GO/CNT) conductors was proposed. The integrated sensor has a crack response mechanism and exhibits excellent sensing performance.
ISSN:2050-7488
2050-7496
DOI:10.1039/d2ta08628j