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Article

Tin Dioxide Thin Film with UV-enhanced Acetone Detection in Microwave Frequency Range

Department of Electronics, AGH University of Science and Technology, 30059 Krakow, Poland
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Author to whom correspondence should be addressed.
Micromachines 2019, 10(9), 574; https://doi.org/10.3390/mi10090574
Received: 29 July 2019 / Revised: 21 August 2019 / Accepted: 29 August 2019 / Published: 30 August 2019
(This article belongs to the Special Issue Nanodevices for Microwave and Millimeter Wave Applications)
In this paper, the UV illumination effect for microwave gas sensors based on the tin dioxide was verified. A UV LED with emission wavelength close to the absorption edge of the SnO2 gas-sensing layer was selected as the UV source. The developed gas sensors were tested under exposure to acetone in the 0–200 ppm range at room temperature. The sensor’s complex reflection coefficient corresponding to target gas concentration was measured with the use of a five-port reflectometer system exhibiting enhanced uncertainty distribution, which allows for the detection of low gas concentration. The UV illumination significantly emphasizes the sensors’ response in terms of both magnitude and phase for low gas concentrations, in contrast to previously reported results, in which only the reflection coefficient’s phase was affected. The highest responses were obtained for modulated UV illumination. View Full-Text
Keywords: gas sensors; acetone detection; microwave application; UV illumination gas sensors; acetone detection; microwave application; UV illumination
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MDPI and ACS Style

Rydosz, A.; Staszek, K.; Brudnik, A.; Gruszczynski, S. Tin Dioxide Thin Film with UV-enhanced Acetone Detection in Microwave Frequency Range. Micromachines 2019, 10, 574. https://doi.org/10.3390/mi10090574

AMA Style

Rydosz A, Staszek K, Brudnik A, Gruszczynski S. Tin Dioxide Thin Film with UV-enhanced Acetone Detection in Microwave Frequency Range. Micromachines. 2019; 10(9):574. https://doi.org/10.3390/mi10090574

Chicago/Turabian Style

Rydosz, Artur; Staszek, Kamil; Brudnik, Andrzej; Gruszczynski, Slawomir. 2019. "Tin Dioxide Thin Film with UV-enhanced Acetone Detection in Microwave Frequency Range" Micromachines 10, no. 9: 574. https://doi.org/10.3390/mi10090574

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