Swelling characteristics and application of two-dimensional materials on hydrophilic quartz crystal resonant dew point sensor
| Autor: | Xiaofeng Meng, Monong Wang, Qiyang Huang, Liwei Lin, Ning Li, Jing Nie, Sunxiang Zheng, Baoxia Mi |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
02 engineering and technology 010402 general chemistry 01 natural sciences chemistry.chemical_compound Materials Chemistry medicine Electrical and Electronic Engineering Composite material Instrumentation Quartz Molybdenum disulfide Metals and Alloys Humidity Quartz crystal microbalance 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Dew point chemistry Surface modification Swelling medicine.symptom 0210 nano-technology Water vapor |
| Zdroj: | Sensors and Actuators B: Chemical. 298:126905 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2019.126905 |
| Popis: | The two-dimensional (2D) water adsorbing material is used as a sensitive layer for the hydrophilic quartz crystal resonant (QCR) dew point sensor, and its own swelling characteristics determine the accuracy of the sensor's recognition of the saturation status of the water vapor. In order to reveal the mechanism relationship between the swelling characteristics of materials and the measurement accuracy of hydrophilic QCR dew point sensors using different 2D materials, we used montmorillonite (MTT), graphene oxide (GO) and molybdenum disulfide (MoS2) coated QCR sensors to test dew point measurement performance in different humidity environment, and then the rate of swelling and intensity of swelling of the three materials were measured by integration of quartz crystal microbalance with dissipation (QCM-D) and ellipsometer. The results showed that MTT had an outstanding swelling rate and intensity with logrithmatic thickness changing curve, especially in the high humidity environment with sudden strength changes. This characteristic makes MTT the most suitable sensitive material for the hydrophilic QCR dew point sensor surface modification among the three 2D materials. Through this study, it implied that the rate of swelling and intensity of swelling are the two major parameters that determines whether a 2D material is suitable for being used as the sensitivity layer of a hydrophilic QCR dew point sensor. |
| Databáze: | OpenAIRE |
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