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Flexible piezoresistive pressure sensor based on a graphene-carbon nanotube-polydimethylsiloxane composite
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作者 huifen wei Xiangmeng Li +2 位作者 Fangping Yao Xinyu Feng Xijing Zhu 《Nanotechnology and Precision Engineering》 EI CAS CSCD 2024年第3期35-44,共10页
Flexible sensors are used widely in wearable devices,specificallyflexible piezoresistive sensors,which are common and easy to manipulate.However,fabricating such sensors is expensive and complex,so proposed here is a si... Flexible sensors are used widely in wearable devices,specificallyflexible piezoresistive sensors,which are common and easy to manipulate.However,fabricating such sensors is expensive and complex,so proposed here is a simple fabrication approach involving a sensor containing microstructures replicated from a sandpaper template onto which polydimethylsiloxane containing a mixture of graphene and carbon nan-otubes is spin coated.The surface morphologies of three versions of the sensor made using different grades of sandpaper are observed,and the corresponding pressure sensitivities and linearity and hysteresis characteristics are assessed and analyzed.The results show that the sensor made using 80-mesh sandpaper has the best sensing performance.Its sensitivity is 0.341 kPa-1 in the loading range of 0–1.6 kPa,it responds to small external loading of 100 Pa with a resistance change of 10%,its loading and unloading response times are 0.126 and 0.2 s,respectively,and its hysteresis characteristic is indicating that the sensor has high sensitivity,fast response,and good stability.Thus,the presented∼7%,piezoresistive sensor is promising for practical applications inflexible wearable electronics. 展开更多
关键词 Piezoresistive sensor Flexible sensor GRAPHENE Carbon nanotube Polymer composite Microstructure
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