Details

Autor(en) / Beteiligte

• Ying, Binbin
• Wu, Qiyang
• Li, Jianyu
• Liu, Xinyu

Titel

An ambient-stable and stretchable ionic skin with multimodal sensation

Ist Teil von

• Materials horizons, 2020-02, Vol.7 (2), p.477-488

Ort / Verlag

Cambridge: Royal Society of Chemistry

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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. A diode-like artificial ionic skin for strain and humidity sensing with controlled ion mobility, high toughness, stretchability, ambient stability and transparency.