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Sensors 2016, 16(11), 1881; doi:10.3390/s16111881

The Impact of Sepiolite on Sensor Parameters during the Detection of Low Concentrations of Alcohols

Faculty of Microsystem Electronics and Photonics, Wrocław University of Science and Technology, Janiszewskiego 11/17, Wrocław 50-372, Poland
Author to whom correspondence should be addressed.
Academic Editors: Eduard Llobet and Stella Vallejos
Received: 26 July 2016 / Revised: 5 October 2016 / Accepted: 9 October 2016 / Published: 9 November 2016
(This article belongs to the Special Issue Gas Nanosensors)
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The article presents the results of the detection of low-concentration C1–C4 alcohols using a planar sensor, in which a sepiolite filter was applied next to the gas-sensitive layer based on tin dioxide. The sepiolite layer is composed of tubes that have a length of several microns, and the diameter of the single tube ranges from several to tens of nanometers. The sepiolite layer itself demonstrated no chemical activity in the presence of volatile organic compounds (VOC), and the passive filter made of this material did not modify the chemical composition of the gaseous atmosphere diffusing to the gas-sensitive layer. The test results revealed that the structural remodelling of the sepiolite that occurs under the influence of temperature, as well as the effect of the filter (a compound with ionic bonds) with molecules of water, has a significant impact on the improvement of the sensitivity of the sensor in relation to volatile organic compounds when compared to the sensor without a filter. View Full-Text
Keywords: nanomaterial; sepiolite filter; alcohols; gas detection; resistive gas sensors nanomaterial; sepiolite filter; alcohols; gas detection; resistive gas sensors

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Suchorska-Woźniak, P.; Rac, O.; Fiedot, M.; Teterycz, H. The Impact of Sepiolite on Sensor Parameters during the Detection of Low Concentrations of Alcohols. Sensors 2016, 16, 1881.

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