Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 19, Pages 17836-17842Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b04045
Keywords
silver nanowire; stretchable; wearable; breathable; kirigami
Funding
- National Science Foundation (NSF) [IIS-1637892, CMMI-1728370]
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Body temperature is an important indicator of the health condition. It is of critical importance to develop a smart temperature sensor for wearable applications. Silver nanowire (AgNW) is a promising conductive material for developing flexible and stretchable electrodes. Here, a stretchable and breathable thermoresistive temperature sensor based on AgNW composites is developed, where a AgNW percolation network is encased in a thin polyimide film. The temperature coefficient of resistance of the AgNW network is tailored by modifying nanowire density and thermal annealing temperature. The temperature sensor is patterned with a Kirigami structure, which enables constant resistance under a large tensile strain (up to 100%). Demonstrated applications in monitoring the temperatures at biceps and knees using the stretchable temperature sensor illustrate the promising potential for wearable applications.
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