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Adv. Funct. Mater., 02 May 2025 | https://doi.org/10.1002/adfm.202504088 Bioinspired Shape Reconfigurable, Printable, and Conductive “E-Skin” Patch with Robust Antibacterial Properties for Human Health Sensing

Hojin Kim^1,2, Sayan Deb Dutta^1,3,4, Myoung Joon Jeon^1,2, Jieun Lee^1,2, Hyeonseo Park^1,2, Youjin Seol^1,2, Ki-Taek Lim^1,2,3

¹Department of Biosystems Engineering, Kangwon University, Chuncheon, Gangwon-do, 24341 Republic of Korea
²Interdisciplinary Program in Smart Agriculture, Kangwon National University, Chuncheon, Gangwon-do, 24341 Republic of Korea
³Institute of Forest Science, Kangwon National University, Chuncheon, Gangwon-do, 24341 Republic of Korea
⁴School of Medicine, University of California Davis, Sacramento, 95817 USA

H.K. and S.D.D. contributed equally to this work.
Corresponding Author: Ki-Taek Lim

Abstract

Conductive hydrogel-based flexible electronic skin, or “E-skin,” patches have garnered significant attention in biomedical engineering due to their capability to sense and detect real-time human motion, health metrics, and environmental changes. Nonetheless, challenges such as precision fabrication, enhanced flexibility, superior self-healing, hydrophilicity, and insufficient bioadhesive properties impede their clinical application and limit their advancement in wearable bioelectronics. In this context, the development of a highly flexible, shape-reconfigurable, stretchable, and printable conductive “E-skin” patch for real-time human motion, humidity, and temperature sensing. This utilizes a polyvinyl alcohol/gelatin/carbon nanotubes/cellulose nanocrystals (PVA/Gelatin/CNTs/CNCs or PVG/NC) based hydrogel inspired by slime molds. Modifying PVG with CNTs and CNCs enhances the mechanical and viscoelastic properties, thereby facilitating high-resolution direct ink writing (DIW) based 3D printing. The resulting slime-like “E-skin” demonstrates an electrical conductivity of ≈5 ± 0.25 S m−1, with exceptional stretchability (≈1000%). The nanocomposite “E-skin” also displays outstanding bioadhesive properties and multiple sensing capabilities for human motion, temperature, and humidity under ambient conditions. Furthermore, the PVG/NC showcases remarkable near-infrared (NIR) responsive attributes, which can be leveraged for eradicating pathogenic bacteria in chronic wounds and exhibit excellent cytocompatibility. This research holds immense promise for future wearable bioelectronics, particularly for non-invasive medical diagnostics.

논문정보

형식Research article
게재일2025년 05월 (BRIC 등록일 2025-05-12)
연구진국내(교신)+국외 연구진
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