Mixed-dimensional MXene-hydrogel heterostructures for electronic skin sensors with ultrabroad working range

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99 Scopus citations

Abstract

Skin-mountable microelectronics are garnering substantial interest for various promising applications including human-machine interfaces, biointegrated devices, and personalized medicine. However, it remains a critical challenge to develop e-skins to mimic the human somatosensory system in full working range. Here, we present a multifunctional e-skin system with a heterostructured configuration that couples vinyl-hybrid-silica nanoparticle (VSNP)–modified polyacrylamide (PAM) hydrogel with two-dimensional (2D) MXene through nano-bridging layers of polypyrrole nanowires (PpyNWs) at the interfaces, featuring high toughness and low hysteresis, in tandem with controlled crack generation and distribution. The multidimensional configurations endow the e-skin with an extraordinary working range (2800%), ultrafast responsiveness (90 ms) and resilience (240 ms), good linearity (800%), tunable sensing mechanisms, and excellent reproducibility. In parallel, this e-skin platform is capable of detecting, quantifying, and remotely monitoring stretching motions in multiple dimensions, tactile pressure, proximity sensing, and variations in temperature and light, establishing a promising platform for next-generation smart flexible electronics.
Original languageEnglish (US)
Pages (from-to)eabb5367
JournalScience advances
Volume6
Issue number48
DOIs
StatePublished - Nov 27 2020

Bibliographical note

KAUST Repository Item: Exported on 2020-11-30
Acknowledged KAUST grant number(s): OSR-2018-CARF/CCF-3079
Acknowledgements: Y.C., C.-W.Y., K.-W.H., and V.T.acknowledge the support from KAUST Catalysis Center (KCC) and the Physical Science Engineering (PSE) division. A.A.A. and J.-H.F. are indebted to the support from the KAUST Solar Center (KSC), Office of Sponsored Research (OSR) under award no. OSR-2018-CARF/CCF-3079. S.J.J. was supported by NIH Common Fund through an NIH Director’s Early Independence Award cofunded by the National Institute of Dental and Craniofacial Research and Office of the Director, NIH, under award number DP5OD028181. S.J.J. also acknowledges Young Investigator Award funds from the Alex’s Lemonade Stand Foundation for Childhood Cancer Research, the Hyundai Hope on Wheels Foundation for Pediatric Cancer Research, and the Tower Cancer Research Foundation.

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