物理化学学报 >> 2009, Vol. 25 >> Issue (02): 327-330.doi: 10.3866/PKU.WHXB20090222

研究论文 上一篇    下一篇

复阻抗法分析聚吡咯材料的湿敏特性

王蕊; 张彤; 贺媛; 耿旺昌; 牛立刚; 李晓天   

  1. 集成光电子学国家重点联合实验室吉林大学实验区, 吉林大学电子科学与工程学院, 长春 130012; 吉林大学材料科学和工程学院, 长春 130012
  • 收稿日期:2008-09-12 修回日期:2008-09-29 发布日期:2009-01-16
  • 通讯作者: 张彤 E-mail:zhangtong@jlu.edu.cn

Complex Impedance Analysis of the Humidity Sensing Properties of Polypyrrole

WANG Rui; ZHANG Tong; HE Yuan; GENG Wang-Chang; NIU Li-Gang; LI Xiao-Tian   

  1. State Key Laboratory on Integrated Optoelectronics Jilin University Region, College of Electronic Science and Engineering, Jilin University, Changchun 130012, P. R. China; College of Materials Science and Engineering, Jilin University, Changchun 130012, P. R. China
  • Received:2008-09-12 Revised:2008-09-29 Published:2009-01-16
  • Contact: ZHANG Tong E-mail:zhangtong@jlu.edu.cn

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摘要： 通过延长聚合时间到96 h合成了一种对湿度敏感的聚吡咯材料. 采用红外(IR)光谱, X射线衍射(XRD)和扫描电子显微镜(SEM)的方法对合成的材料进行了表征. 测量了基于该材料的湿敏元件的湿度特性, 并且得到了在20 Hz-100 kHz频率范围内的复阻抗谱图. 基于测量结果讨论了该材料制备的湿敏元件的湿度敏感机制. 通过对复阻抗谱的分析研究了该湿敏元件的工作机理并且分析了参与导电的粒子.

关键词: 聚吡咯, 湿敏元件, 复阻抗

Abstract: Polypyrrole was obtained by chemical synthesis. The extension of polymerization time to 96 h produced a polypyrrole that was suitable for absorbing moisture. The structure and morphology of polypyrrole were characterized by infrared (IR) spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). Properties of this humidity sensor were investigated and complex impedance plots were obtained from 20 Hz to 100 kHz. The sensing mechanism was discussed based on test results. Using complex impedance analysis we studied the working principle of the humidity sensor and confirmed the identity of the conductive particles.

Key words: Polypyrrole, Humidity sensor, Complex impedance

MSC2000: 

  • O646