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A linear and large-range pressure sensor based on a graphene/silver nanowires nanobiocomposites network and a hierarchical structural sponge
Composites Science and Technology ( IF 9.1 ) Pub Date : 2018-02-01 , DOI: 10.1016/j.compscitech.2017.11.028
Xuchu Dong , Yong Wei , Song Chen , Yong Lin , Lan Liu , Jing Li

Abstract It is challenging to manufacture pressure-sensing materials that possess linearly sensitive regime, high sensitivity, and large-range detection for the development of artificial intelligence products. Herein, a very simple approach is proposed to fabricate piezoresistive sensors based on hierarchical structure sea sponges and composites conductive networks of polydopamine reduced graphene oxides and silver nanowires. The hierarchical structures of porous sea sponges including the contacting of multi-scale porous skeletons and the bending of nodes vary synchronously, resulting in the linear relationship between applied compress strain and resistances, Moreover, the as-prepared pressure sensor exhibits a high sensitivity (S = 0.016 kPa −1 at 0-40 kPa) and a large area detection range (gauge factor = 1.5 at 0-60% strain). The synergetic effect of the composites conductive network endows the sensor with excellent reproducibility (>7000 loading/unloading cycles) and fast response time (

中文翻译:

基于石墨烯/银纳米线纳米生物复合材料网络和分层结构海绵的线性大范围压力传感器

摘要 制造具有线性敏感范围、高灵敏度和大范围检测的压力传感材料对于人工智能产品的开发具有挑战性。在此,提出了一种非常简单的方法来制造基于分层结构海绵和聚多巴胺还原氧化石墨烯和银纳米线的复合导电网络的压阻传感器。多孔海绵的层次结构包括多尺度多孔骨架的接触和节点的弯曲同步变化,导致施加的压缩应变和电阻之间的线性关系,而且所制备的压力传感器表现出高灵敏度(S = 0.016 kPa -1 在 0-40 kPa) 和大面积检测范围(应变系数 = 1.5 在 0-60% 应变)。
更新日期:2018-02-01
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