材料科学
电极
石墨烯
线性范围
复合材料
灵敏度(控制系统)
分形
航程(航空)
压力传感器
纳米技术
电子工程
机械工程
检出限
化学
色谱法
工程类
数学分析
物理化学
数学
作者
Tingting Yu,Dongguang Zhang,Yali Wu,Shizhong Guo,F. Lei,Li Yang,Jiayi Yang
出处
期刊:Carbon
[Elsevier BV]
日期:2021-06-16
卷期号:182: 497-505
被引量:45
标识
DOI:10.1016/j.carbon.2021.06.049
摘要
Piezoresistive sensors based on three-dimensional graphene foams (GFs) can be used in health monitoring, electronic skin and wearable smart devices. It is still challenging to obtain sensors with high sensitivity and a wide linear range through a simple and an efficient method. In this paper, a graphene foam pressure sensor based on a fractal electrode (GFPSFE) is proposed. The GFPSFE contains a wave-structured GF (WSGF), a fractal electrode (FE), and a normal electrode. The FE regulates the contact resistance of the WSGF, improving the sensitivity and the linear range of the GFPSFE. We compared three GFPSFEs with different FEs, and investigated the influence of FEs on the sensitivity and the linear range of GFPSFEs. The GFPSFE with zigzag FE (Z-GFPSFE) has high sensitivity (134.75 kPa −1 ), wide linear range (0–35 kPa), fast response/recovery (83 ms and 166 ms), and excellent stability (2000 cycles). In addition, the sensor was attached to the human body to measure motions and pulse, demonstrating the potential application in the fields of health monitoring and human-machine interfaces.
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