journal article·2022-11-23

Ultrapermeable and Wet-Adhesive Monolayer Porous Film for Stretchable Epidermal Electrode

Qiong Tian, Hang Zhao, Rui Zhou, Tengfei Li, Jianping Huang, Wei Tong, Ruijie Xie, Qingsong Li, Guanglin Li, Zhiyuan Liu

ACS Applied Materials & Interfaces· Volume 14· Issue 46
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Abstract

Noninvasive electrophysiological signal monitoring is significant for health care and scientific research. The simultaneous achievement of wet adhesion, stretchability, breathability, and low contact impedance is highly recommended in the epidermal electrode but still challenging. In this work, a monolayer porous film electrode with a pore size and wall thickness of less than ∼10 μm is fabricated via the breath figure method (BFM) and metal sputtering, and it was subsequently applied using epidermal electrophysiological monitoring. The ultrahigh permeability is comparable to the naked skin because the through holes of the monolayer porous film match well with the pores on human skin. The stretchability of 50% is realized with the combination of Au microcrack and the monolayer porous structure. The wet adhesion of 0.17 N/cm is established on the chemical bonding between the electrode and the epidermis. The contact impedance is comparable with the gold standard Ag/AgCl gel electrode, especially after sweating. Stable and precise electrophysiological signals are measured. Especially, the perspiration resistance of the monolayer porous film outperforms that of the gel electrode. The monolayer porous structure provides a new avenue to improve the breathability of the epidermal electronics.
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Research context

OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Tactile and Sensory Interactions · Neuroscience and Neural Engineering

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Research Center for Neural Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China

MOE Key Laboratory of Materials Physics and Chemistry in Extraordinary Conditions, Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi’an 710072, People’s Republic of China

School of Mechanical, Electrical & Information Engineering, Shandong University, Weihai 264209, People’s Republic of China

Department of Nano Science and Technology Institute, University of Science and Technology of China, Suzhou, Jiangsu 230026, China

The Institute of Flexible Electronics (IFE, Future Technologies), Xiamen University, Xiamen 361005, Fujian China

Funding

Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China · Guangdong Basic and Applied Basic Research Foundation · Guangdong-Hong Kong-Macao Joint Laboratory of Human-Machine Intelligence-Synergy Systems · SIAT Innovation Program for Excellent Young Researcher

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