Surface Acoustic Wave DMMP Gas Sensor with a Porous Graphene/PVDF Molecularly Imprinted Sensing Membrane

Sheng Xu; Rui Zhang; Junpeng Cui; Tao Liu; Xiuli Sui; Meng Han; Fu Zheng; Xiaoguang Hu

doi:10.3390/mi12050552

Micromachines (May 2021)

Surface Acoustic Wave DMMP Gas Sensor with a Porous Graphene/PVDF Molecularly Imprinted Sensing Membrane

Sheng Xu,
Rui Zhang,
Junpeng Cui,
Tao Liu,
Xiuli Sui,
Meng Han,
Fu Zheng,
Xiaoguang Hu

Affiliations

Sheng Xu: School of Software and Communication, Tianjin Sino-German University of Applied Sciences, Tianjin 300350, China
Rui Zhang: School of Software and Communication, Tianjin Sino-German University of Applied Sciences, Tianjin 300350, China
Junpeng Cui: School of Software and Communication, Tianjin Sino-German University of Applied Sciences, Tianjin 300350, China
Tao Liu: School of Software and Communication, Tianjin Sino-German University of Applied Sciences, Tianjin 300350, China
Xiuli Sui: School of Software and Communication, Tianjin Sino-German University of Applied Sciences, Tianjin 300350, China
Meng Han: Deepinfar Ocean Technology Co., Ltd., Building #28, Tianjin Binhai Innovation Park, Tianjin 300000, China
Fu Zheng: Tianjin Key Laboratory of Film Electronic and Communicate Devices, School of Electrical and Electronic Engineering, Tianjin University of Technology, Tianjin 300384, China
Xiaoguang Hu: School of Software and Communication, Tianjin Sino-German University of Applied Sciences, Tianjin 300350, China

DOI: https://doi.org/10.3390/mi12050552
Journal volume & issue: Vol. 12, no. 5
p. 552

Abstract

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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.

Published in Micromachines

ISSN: 2072-666X (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Mechanical engineering and machinery
Website: https://www.mdpi.com/journal/micromachines

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