摘要
As humidity is one of the most widely demanded environmental parameters,the precision of its detection is significant.An advanced humidity sensor will improve the validity of the humidity monitoring system.In this study,a facile chemical layer-by-layer self-assembly(CLS)method was developed for fabricating graphene oxide(GO)/polyethyleneimine(PEI)multilayer films.Owing to the chemical bonding between the PEI and GO,and the intrinsic stickiness of the PEI,layered films with different numbers of layers were successfully prepared using the CLS method and confirmed through ultraviolet-visible(UV-Vis)spectroscopy and the mass loading of quartz crystal microbalance(QCM).Morphological measurements revealed that the roughness and thickness of the films increased exponentially with the number of bilayers.The GO/PEI films were deposited on QCM electrodes using the CLS method to produce the humidity sensors.The humidity measurement results showed a high sensitivity(37.84 Hz/%RH)and rapid response/recovery(<5 s/8 s)of the optimal sensor,which was superior to that of recently developed QCM sensors.
出处
《Rare Metals》
SCIE
EI
CAS
CSCD
2021年第6期1597-1603,共7页
稀有金属（英文版）
基金
financially supported by the National Natural Science Foundation of China(No.U19A2070)
the National Science Funds for Excellent Young Scholars of China(No.61822106)
the National Science Funds for Creative Research Groups of China(No.61421002)。
作者简介
Hui-Ling Tai,e-mail:taitai1980@uestc.edu.cn。
