Enhancement humidity sensing properties of graphene oxide/Poly(ethyleneimine) film QCM sensors

Author

Zhen Yuan;Hulling Tai;Xiaohua Bao;Zongbiao Ye;Chunhua Liu;Yadong Jiang

Author_Institution

State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China

fYear

2015

Firstpage

1

Lastpage

4

Abstract

In this work, a novel graphene oxide (GO)/Poly(ethyleneimine) (PEI) layered film was prepared on the quartz crystal microbalance (QCM) by feasible spray process for the humidity detection. The morphology of sensitive film was analyzed by field emission scanning electron microscopy (FESEM). it was worth mentioning that a chemical bonding could be formed at the interface between PEI and GO sheets due to the acylation reaction, which was proved by the Fourier transform infrared (FTIR) transmission spectrum characterization. The humidity-sensing results showed that the frequency shift of sensors exhibited the excellent response and reproducibility, which might be partly ascribed to the effective interaction between PEI and GO. Meanwhile, an instant recovery time (5s) and negligible humidity hysteresis (less than 1%RH) were achieved. Furthermore, the mechanism of performance enhancement of layered film sensors was analyzed.

Keywords

"Humidity","Films","Hysteresis","Chemical sensors","Sensor phenomena and characterization","Graphene"

Publisher

ieee

Conference_Titel

SENSORS, 2015 IEEE

Type

conf

DOI

10.1109/ICSENS.2015.7370400

Filename

7370400