signature=874d35de771f000cd34718a6fed95e40,Muscle-Inspired Self-Healing Hydrogels for Strain and Tem...

摘要：

Recently, self-healing hydrogel bioelectronic deviceshave raisedenormous interest for their tissue-like mechanical compliance, desirablebiocompatibility, and tunable adhesiveness on bioartificial organs.However, the practical applications of these hydrogel-based sensorsare generally limited by their poor fulfillment of stretchabilityand sensitivity, brittleness under subzero temperature, and singlesensory function. Inspired by the fiber-reinforced microstructuresand mechano-transduction systems of human muscles, a self-healing(90.8%), long-lasting thermal tolerant and dual-sensory hydrogel-basedsensor is proposed, with high gauge factor (18.28) within broad strainrange (268.9%), low limit of detection (5% strain), satisfactory thermosensation(0.016 °C^–1), and highly discernibletemperature resolution (2.7 °C). Especially by introducing aglycerol/water binary solvent system, desirable subzero-temperatureself-healing performance, high water-retaining, and durable adhesionfeature can be achieved, resulting from the ice crystallization inhibitionand highly dynamic bonding. On account of the advantageous mechanoreceptionand thermosensitive capacities, a flexible touch keyboard for signatureidentification and a "fever indicator" for human forehead'stemperature detection can be realized by this hydrogel bioelectronicdevice.

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