A QCM humidity sensor constructed by graphene quantum dots and chitosan composites
A QCM humidity sensor constructed by graphene quantum dots and chitosan composites
复制标题
石墨烯量子点和壳聚糖复合材料构建的QCM湿度传感器
DOI：
10.1016/j.sna.2019.01.009
复制
发表时间：
2019-03-01
影响因子：
4.6
通讯作者：
Wang, Rui
中科院分区：
文献类型：
--
作者：
Qi, Pengjia;Zhang, Tong;Wang, Rui
采用石墨烯量子点-壳聚糖（GQDs-CS）敏感膜，成功制备了石英晶体微天平（QCM）湿度传感器。优化了敏感材料的配比和敏感膜的涂布质量。通过扫描电镜（SEM）、透射电镜（TEM）和傅里叶变换红外光谱（FT-IR）对GQDs-CS复合材料的形貌和化学性能进行了表征。结果表明，所制备的QCM传感器具有较高的响应灵敏度（95%RH时的频移为-3291Hz）、较短的响应/恢复时间（36 s/3s）、较小的湿滞（1 ~ 0.6%RH）、良好的重现性、可逆性和长期稳定性。此外，还利用阻抗分析法对QCM传感器的电声参数进行了研究。基于对传感器的动态和静态分析，推测GQD的引入增强了CS膜的机械刚度，可以有效提高QCM传感器的性能。(C)2019 Elsevier B. V.版权所有。
A quartz crystal microbalance (QCM) humidity sensor based on graphene quantum dots-chitosan (GQDs-CS) sensitive film has been successfully fabricated in this work. The composite ratio of sensitive material and the coating quality of the sensitive film were optimized. The morphological and chemical properties of GQDs-CS composites were inspected via scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Fourier Transform infrared spectroscopy (FT-IR). The results manifest that prepared QCM sensor exhibits high response sensitivity (a frequency shift of -3291 Hz at 95% RH), short response/recovery time (36 s/3 s), tiny humidity hysteresis ((1) over tilde .6% RH), and excellent reproducibility, reversibility and long-term stability. Additionally, the electroacoustic parameters of the QCM sensors were also investigated by means of the impedance analysis method. Based on dynamic and static analysis of the sensor, it is speculated that the introduction of GQDs into CS enhanced the mechanical stiffness of the CS film, which could effectively improve the performance of QCM sensor. (C) 2019 Elsevier B.V. All rights reserved.