Affiliation:
1. School of Electrical and Electronic Engineering Yonsei University Seoul 03722 Republic of Korea
2. LYNK Solutec inc. Seoul 03722 Republic of Korea
3. Department of Chemical and Biomolecular Engineering Yonsei University Seoul 03722 Republic of Korea
4. Department of Physiology Yonsei University College of Medicine Seoul 03722 Republic of Korea
5. Division of Engineering in Medicine Department of Medicine Brigham and Women's Hospital Harvard Medical School 65 Lansdowne Street Cambridge MA 02139 USA
Abstract
AbstractDeveloping bioelectronics that retains their long‐term functionalities in the human body during daily activities is a current critical issue. To accomplish this, robust tissue adaptability and biointerfacing of bioelectronics should be achieved. Hydrogels have emerged as promising materials for bioelectronics that can softly adapt to and interface with tissues. However, hydrogels lack toughness, requisite electrical properties, and fabrication methodologies. Additionally, the water‐swellable property of hydrogels weakens their mechanical properties. In this work, an intrinsically nonswellable multifunctional hydrogel exhibiting tissue‐like moduli ranging from 10 to 100 kPa, toughness (400–873 J m−3), stretchability (≈1000% strain), and rapid self‐healing ability (within 5 min), is developed. The incorporation of carboxyl‐ and hydroxyl‐functionalized carbon nanotubes (fCNTs) ensures high conductivity of the hydrogel (≈40 S m−1), which can be maintained and recovered even after stretching or rupture. After a simple chemical modification, the hydrogel shows tissue‐adhesive properties (≈50 kPa) against the target tissues. Moreover, the hydrogel can be 3D printed with a high resolution (≈100 µm) through heat treatment owing to its shear‐thinning capacity, endowing it with fabrication versatility. The hydrogel is successfully applied to underwater electromyography (EMG) detection and ex vivo bladder expansion monitoring, demonstrating its potential for practical bioelectronics.
Funder
National Research Foundation of Korea
Yonsei University
Subject
General Physics and Astronomy,General Engineering,Biochemistry, Genetics and Molecular Biology (miscellaneous),General Materials Science,General Chemical Engineering,Medicine (miscellaneous)
Cited by
10 articles.
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