期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 283, 期 -, 页码 659-665出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2018.12.081
关键词
Fast-response; Highly linear; Quartz crystal microbalance; Humidity sensor; Polyvinyl alcohol; Nano-silica
资金
- Opening Foundation of National Engineering Research Center for Sugarcane [PTJH1500114]
- China Postdoctoral Science Foundation [2017M612106]
- Scientific Research Starting Foundation for the Returned Overseas Chinese Scholars, Ministry of Education of China
- Open Fund of State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences [20160025]
A fast-response and highly linear humidity sensor based on quartz crystal microbalance (QCM) was prepared by using polyvinyl alcohol (PVA) and nano-silica composites as sensing film. The mass ratio of PVA to nano-silica and the total mass of sensing film which can significantly influence the response time and linearity of humidity sensor were well discussed. The results show that the optimal mass ratio of PVA to nano-silica is 1:1.5 and the total mass of the sensing film coated on the surface of QCM is 1.0 mu g. Under the optimum conditions, the frequency shifts linearly respond to the relative humidity. The prepared humidity sensor has short response time (5 s), short recovery time (21 s), good stability and reproducibility. The developed humidity sensor is expected to be used for the detection of humidity in practice.
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