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An ambient-stable and stretchable ionic skin with multimodal sensation

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Abstract

Skin serves as a physical and hygroscopic barrier to protect the inner body, and also contains sensory receptors to perceive environmental and mechanical stimuli. To recapitulate these salient features, hydrogel-based artificial skins have been developed. However, existing designs are constrained by limited functionality, low stability, and requirement of external power. Herein, a novel artificial ionic skin (AIskin) – an analog of the diode based on controlled ion mobility – is demonstrated with high toughness, stretchability, ambient stability and transparency. The AIskin consists of a bilayer of oppositely-charged, double-network hydrogel, and converts mechanical stimuli and humidity into signals of resistance, capacitance, open-circuit voltage (OCV), and short-circuit current (SCC), among which the OCV- and SCC-based sensing signals are self-generated. Its multimodal sensation is maintained in a wide range of relative humidities (13–85%). It is demonstrated for wearable strain-humidity sensing, human–machine interaction and walking energy harvesting. This work will open new avenues toward next-generation, skin-inspired wearable electronics.

Graphical abstract: An ambient-stable and stretchable ionic skin with multimodal sensation

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Publication details

The article was received on 09 May 2019, accepted on 08 Oct 2019 and first published on 11 Oct 2019


Article type: Communication
DOI: 10.1039/C9MH00715F
Mater. Horiz., 2019, Advance Article

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    An ambient-stable and stretchable ionic skin with multimodal sensation

    B. Ying, Q. Wu, J. Li and X. Liu, Mater. Horiz., 2019, Advance Article , DOI: 10.1039/C9MH00715F

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