Abstract
Flexible sensors are used widely in wearable devices,specifically flexible 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～7％,indicating that the sensor has high sensitivity,fast response,and good stability.Thus,the presented piezoresistive sensor is promising for practical applications in flexible wearable electronics.
基金项目
Science and Technology Cooperation and Exchange Special Project of Shanxi Province(202204041101006)
Fundamental Research Program of Shanxi Province(20210302123013)
Fundamental Research Program of Shanxi Province(202203021222077)
Fundamental Research Program of Shanxi Province(202203021222069)
Shanxi Scholarship Council of China(2023-130)
国家科技期刊平台
NSTL
万方数据