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A Universal Interfacial Strategy Enabling Ultra-Robust Gel Hybrids for Extreme Epidermal Bio-Monitoring

机译:A Universal Interfacial Strategy Enabling Ultra-Robust Gel Hybrids for Extreme Epidermal Bio-Monitoring

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摘要

A seamless and tough interface to integrate incompatible/immiscible softmaterials is highly desired for flexible/wearable electronics and many softdevices with multi-layer structures. Here, a surfactant-mediated interfacialchemistry is introduced to achieve seamless and tough interfaces insoft multi-layer structures, with an ultra-high interfacial toughness up to≈1300 J m~(?2) for the architectural gel hybrid (AGH). The reversible noncovalentinterfacial interactions efficiently dissipate energy at the interface, therebyproviding excellent durability. The interfacial toughness only decreases by≈6.9 after 10 000 tensile cycles. This strategy can be universally applied tohybrid systems with various interfaces between an interior hydrogel (PAA,PVA, PAAm, and gelatin) and an exterior hydrophobic soft matter (ionogel,lipogel and elastomer). The AGH-based mechano-sensor presents highrobustness and stability in a wide range of conditions, including open air,underwater, and various solvents and temperatures. Epidermal bio-monitoring,tactile trajectory, and facial expression recognition are demonstratedusing the AGH sensors in various environments. A rich set of electrophysiologicalsignals of high quality are acquired.

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