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Skin-like transparent polymer–hydrogel hybrid pressure sensor with pyramid microstructures

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Title
Skin-like transparent polymer–hydrogel hybrid pressure sensor with pyramid microstructures
Author(s)
Kang, Kyumin; Jung, Hyunjin; An, Soojung; Baac, Hyoung Won; Mikyung Shin; Donghee Son
Publication Date
2021-10
Journal
Polymers, v.13, no.19, pp.1 - 8
Publisher
MDPI
Abstract
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.Soft biomimetic electronic devices primarily comprise an electronic skin (e-skin) capable of implementing various wearable/implantable applications such as soft human–machine inter-faces, epidermal healthcare systems, and neuroprosthetics owing to its high mechanical flexibility, tissue conformability, and multifunctionality. The conformal contact of the e-skin with living tissues enables more precise analyses of physiological signals, even in the long term, as compared to rigid electronic devices. In this regard, e-skin can be considered as a promising formfactor for developing highly sensitive and transparent pressure sensors. Specifically, to minimize the modulus mismatch at the biotic–abiotic interface, transparent-conductive hydrogels have been used as electrodes with exceptional pressing durability. However, critical issues such as dehydration and low compatibility with elastomers remain a challenge. In this paper, we propose a skin-like transparent polymer– hydrogel hybrid pressure sensor (HPS) with microstructures based on the polyacrylamide/sodium-alginate hydrogel and p-PVDF-HFP-DBP polymer. The encapsulated HPS achieves conformal contact with skin due to its intrinsically stretchable, highly transparent, widely sensitive, and anti-de-hydrative properties. We believe that the HPS is a promising candidate for a robust transparent epidermal stretchable-skin device.
URI
https://pr.ibs.re.kr/handle/8788114/10373
DOI
10.3390/polym13193272
ISSN
2073-4360
Appears in Collections:
Center for Neuroscience Imaging Research (뇌과학 이미징 연구단) > 1. Journal Papers (저널논문)
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