Enhanced sensitivity of humidity sensor using Nafion/graphene oxide quantum dot nanocomposite*

被引：15
作者：
Li, Xiaoyu [1 ]
Ni, Lei [1 ]
Chen, Ni [1 ]
Liu, Jianli [1 ]
Li, Wenjun [1 ]
Xian, Yu [1 ]
机构：
[1] Chengdu Technol Univ, Chengdu 6117301, Peoples R China
来源：
MEASUREMENT | 2021年 / 181卷
基金：
中国国家自然科学基金;
关键词：
Humidity sensor; Capacitance; Nafion; GOQD nanocomposite; Interdigital electrodes; Sensitivity; FACILE FABRICATION; COMPOSITE; NAFION; ZNO; PERFORMANCE; NANOPARTICLES; ACID;
D O I：
10.1016/j.measurement.2021.109566
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper, a capacitance humidity sensor which was fabricated by interdigital electrodes (IDEs) coated with Nafion/graphene oxide quantum dot (GOQD) thin film was reported. The sensor could convert concentration change of moisture into capacitance change of the IDEs. The morphological and nanostructure of the prepared Nafion/GOQD nanocomposite were characterized by the scanning electron microscopy (SEM), transmission electron microscopy (TEM), confirming that the Nafion/GOQD nanocomposite was successfully prepared. Test result showed that the proposed sensor exhibited higher sensitivity of 1025.99 pF/%RH (nearly double) and better linearity, compared with pure Nafion sensor, which could be ascribed to formation of a subordinateassembly of 0D GOQD in the Nafion film. Furthermore, the humidity sensor exhibited excellent repeatability, fast response and recovery, and little hysteresis. It could offer a potential method to monitor the respiration. Lastly, the humidity sensing mechanism was studied through complex impedance spectra (CIS).
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页数：7
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