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Fabrication of polypyrrole/graphene oxide hybrid nanocomposite for ultrasensitive humidity sensing with unprecedented sensitivity

  • Mengyu Wang
  • Dongzhi ZhangEmail author
  • Aijun YangEmail author
  • Dongrui Wang
  • Xiaoqi Zong
Article
  • 52 Downloads

Abstract

An ultrasensitive humidity sensor using polypyrrole/graphene oxide (PPy/GO) nanocomposite as sensing film was fabricated by chemical oxidative polymerization method. The nanostructural characteristics of the PPy/GO sample were examined by a series of characterization techniques. The capacitance and complex impedance spectra of the PPy/GO film sensor at different relative humidity and applied frequencies were measured at room temperature of 20 °C. An unprecedented response, outstanding repeatability and ultralow hysteresis were demonstrated by the PPy/GO film sensor. Furthermore, the equivalent circuits and Bode plots for the PPy/GO film sensor were employed to discover its humidity sensing mechanism. This work highlights that the PPy/GO film based sensor can achieve the ultrasensitive humidity detection over a wide range of 11–97% due to its hydrophilic properties and swell effect of polypyrrole.

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China (51777215), the Key Research & Development Plan Project of Shandong Province (2018GSF117002), the Fundamental Research Funds for the Central Universities of China (18CX07010A), the Open Funds of National Engineering Laboratory for Mobile Source Emission Control Technology (NELMS2017B03), and the Open Fund of Key Laboratory of Marine Spill Oil Identification and Damage Assessment Technology, State Oceanic Administration of China (201801).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Key Laboratory of Unconventional Oil & Gas Development, Ministry of Education, College of Information and Control EngineeringChina University of Petroleum (East China)QingdaoChina
  2. 2.State Key Laboratory of Electrical Insulation and Power EquipmentXi’an Jiaotong UniversityXi’anChina

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