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- Title
Surface Acoustic Wave DMMP Gas Sensor with a Porous Graphene/PVDF Molecularly Imprinted Sensing Membrane.
- Authors
Xu, Sheng; Zhang, Rui; Cui, Junpeng; Liu, Tao; Sui, Xiuli; Han, Meng; Zheng, Fu; Hu, Xiaoguang; Emadi, Arezoo
- Abstract
In this paper, surface acoustic wave (SAW) sensors containing porous graphene/PVDF (polyvinylidene fluoride) molecularly imprinted sensitive membrane for DMMP gas detection were investigated. A 433 MHz ST-cut quartz SAW resonator was used to convert gas concentration changes into frequency shifts by the sensors. The porous graphene/PVDF film was fabricated on the sensor's surface by using the tape-casting method. DMMP molecules were adsorbed on the porous structure sensing film prepared by the 2-step method to achieve the specific recognition effect. The sensitivity of the sensor could reach −1.407 kHz·ppm−1. The response time and recovery time of the SAW sensor with porous graphene/PVDF sensing membrane were about 4.5 s and 5.8 s at the concentration of 10 ppm, respectively. The sensor has good anti-interference ability to most gases in the air.
- Subjects
ACOUSTIC surface waves; GAS detectors; SURFACE acoustic wave sensors; POLYVINYLIDENE fluoride; GRAPHENE; CRYSTAL oscillators; ADHESIVE tape; QUARTZ
- Publication
Micromachines, 2021, Vol 12, Issue 5, p552
- ISSN
2072-666X
- Publication type
Article
- DOI
10.3390/mi12050552