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Tissue-like skin-device interface for wearable bioelectronics by using ultrasoft, mass-permeable, and low-impedance hydrogels

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Title
Tissue-like skin-device interface for wearable bioelectronics by using ultrasoft, mass-permeable, and low-impedance hydrogels
Author(s)
Chanhyuk Lim; Yongseok Joseph Hong; Jaebong Jung; Yoonsoo Shin; Sung-Hyuk Sunwoo; Seungmin Baik; Ok Kyu Park; Sueng Hong Choi; Taeghwan Hyeon; Ji Hoon Kim; Sangkyu Lee; Dae-Hyeong Kim
Publication Date
2021-05
Journal
Science Advances, v.7, no.19
Publisher
American Association for the Advancement of Science
Abstract
© 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).Hydrogels consist of a cross-linked porous polymer network and water molecules occupying the interspace between the polymer chains. Therefore, hydrogels are soft and moisturized, with mechanical structures and physical properties similar to those of human tissue. Such hydrogels have a potential to turn the microscale gap between wearable devices and human skin into a tissue-like space. Here, we present material and device strategies to form a tissue-like, quasi-solid interface between wearable bioelectronics and human skin. The key material is an ultrathin type of functionalized hydrogel that shows unusual features of high mass-permeability and low impedance. The functionalized hydrogel acted as a liquid electrolyte on the skin and formed an extremely conformal and low-impedance interface for wearable electrochemical biosensors and electrical stimulators. Furthermore, its porous structure and ultrathin thickness facilitated the efficient transport of target molecules through the interface. Therefore, this functionalized hydrogel can maximize the performance of various wearable bioelectronics.
URI
https://pr.ibs.re.kr/handle/8788114/9884
DOI
10.1126/sciadv.abd3716
ISSN
2375-2548
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > 1. Journal Papers (저널논문)
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