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Open AccessArticle

Detection of Volatile Organic Compounds Using Surface Acoustic Wave Sensor Based on Nanoparticles Incorporated in Polymer

Laser Department, National Institute for Laser, Plasma and Radiation Physics, 077125 Magurele, Romania
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Coatings 2019, 9(6), 373; https://doi.org/10.3390/coatings9060373
Received: 7 May 2019 / Revised: 4 June 2019 / Accepted: 6 June 2019 / Published: 8 June 2019
In this work, surface acoustic wave (SAW) sensors with two types of polymer sensing films, polyethyleneimine (PEI) and polydimethylsiloxane (PDMS), containing embedded ZnO, TiO2, and WO3 nanoparticles (NPs) for detecting volatile organic compounds (VOCs) were produced and studied. The NPs were obtained using the pulsed laser ablation method, with the same deposition conditions used for all three materials studied. After incorporation of the NPs into the polymer, the suspension obtained was deposited using the airbrush method onto the quartz substrate of the sensor. Sensors were tested for four types of VOCs: Ethanol, toluene, acetone, and dichloroethane. Those based on PEI-sensitive films showed a superior sensitivity to those with PDMS. It was also found that the sensors with WO3 NPs had the best results for ethanol, acetone, and dichloroethane. The limit of detection (LOD) of the PEI/WO3 sensor was 6 ppm for ethanol, 15 ppm for acetone, and 9 ppm for dichloroethane. For toluene, the best response was obtained using the PEI/ZnO sensor, which produced a LOD of 9 ppm. View Full-Text
Keywords: surface acoustic wave (SAW); sensor; polymer coating; nanoparticles; volatile organic compounds (VOC); pulsed laser deposition (PLD) surface acoustic wave (SAW); sensor; polymer coating; nanoparticles; volatile organic compounds (VOC); pulsed laser deposition (PLD)
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Constantinoiu, I.; Viespe, C. Detection of Volatile Organic Compounds Using Surface Acoustic Wave Sensor Based on Nanoparticles Incorporated in Polymer. Coatings 2019, 9, 373.

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