期刊
ACS NANO
卷 14, 期 1, 页码 218-228出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.9b07874
关键词
muscle-inspired; self-healing; hydrogel; thermosensation; strain sensor
类别
资金
- National Natural Science Foundation of China [61775095, 61775089]
- six talent peak innovation team in Jiangsu Province [TD-SWYY-009]
Recently, self-healing hydrogel bioelectronic devices have raised enormous interest for their tissue-like mechanical compliance, desirable biocompatibility, and tunable adhesiveness on bioartificial organs. However, the practical applications of these hydrogel-based sensors are generally limited by their poor fulfillment of stretchability and sensitivity, brittleness under subzero temperature, and single sensory function. Inspired by the fiber-reinforced microstructures and mechano-transduction systems of human muscles, a self-healing (90.8%), long-lasting thermal tolerant and dual-sensory hydrogel-based sensor is proposed, with high gauge factor (18.28) within broad strain range (268.9%), low limit of detection (5% strain), satisfactory thermosensation (-0.016 degrees C-1), and highly discernible temperature resolution (2.7 degrees C). Especially by introducing a glycerol/water binary solvent system, desirable subzero-temperature self-healing performance, high water-retaining, and durable adhesion feature can be achieved, resulting from the ice crystallization inhibition and highly dynamic bonding. On account of the advantageous mechanoreception and thermosensitive capacities, a flexible touch keyboard for signature identification and a fever indicator for human forehead's temperature detection can be realized by this hydrogel bioelectronic device.
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