【摘 要】
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Flexible piezoresistive pressure sensors can offer convenient detection of mechanical deformations for wearable electronics. Previous studies of flexible piezoresistive pressure sensors focus on the sensitivity but the low-cost and self-powered sensors re
【机 构】
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Key Laboratory of Textile Science&Technology of Ministry of Education,Donghua University,Shanghai 20
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Flexible piezoresistive pressure sensors can offer convenient detection of mechanical deformations for wearable electronics. Previous studies of flexible piezoresistive pressure sensors focus on the sensitivity but the low-cost and self-powered sensors remain a challenge due to the deviation of resistance signal acquisition caused by thermoelectric voltage. Here, piezoresistive pressure sensors with ultralow Seebeck coefficient of -0. 72 μV/K based on carbon nanotubes ( CNTs )/polyethyleneimine (PEI)/melamine(CPM) sponge are reported. Due to the diminished Seebeck effect, the CPM sponge pressure sensors successfully reduce the deviation to 18. 75％ and can keep stable sensitivity and resistance change under a very low working voltage and change temperature environment. The stable properties of the sensors make them successful to work for real-time sensing in self-powered wearable electronics.
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