Regular research article
01 Feb 2018
Regular research article | 01 Feb 2018
Nanocomposite sensors of propylene glycol, dimethylformamide and formaldehyde vapors
Zaven Adamyan1, Artak Sayunts1, Vladimir Aroutiounian1, Emma Khachaturyan1, Martin Vrnata2, Přemysl Fitl2, and Jan Vlček2
Zaven Adamyan et al.
Zaven Adamyan1, Artak Sayunts1, Vladimir Aroutiounian1, Emma Khachaturyan1, Martin Vrnata2, Přemysl Fitl2, and Jan Vlček2
- 1Department of Physics of Semiconductors and Microelectronics, Center
of Semiconductor Devices and Nanotechnologies, Yerevan State University, 1
A. Manoukian, 0025 Yerevan, Armenia
- 2Department of Physics and Measurement Technology, University of Chemistry and Technology, Technická 5, 166 28 Prague 6, Czech Republic
- 1Department of Physics of Semiconductors and Microelectronics, Center
of Semiconductor Devices and Nanotechnologies, Yerevan State University, 1
A. Manoukian, 0025 Yerevan, Armenia
- 2Department of Physics and Measurement Technology, University of Chemistry and Technology, Technická 5, 166 28 Prague 6, Czech Republic
Correspondence: Artak Sayunts (sayuntsartak@ysu.am)
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Received: 28 Sep 2017 – Revised: 13 Dec 2017 – Accepted: 27 Dec 2017 – Published: 01 Feb 2018
Abstract. The results of research works related to the study of thick-film multiwall carbon nanotube–tin oxide nanocomposite sensors of propylene glycol (PG), dimethylformamide (DMF) and formaldehyde (FA) vapors are presented in this paper. These sensors were derived using hydrothermal synthesis and sol–gel methods. Investigations of response–recovery characteristics in the 50–300 °C operating temperature range reveal that the optimal operating temperature for PG, DMF and FA vapor sensors, taking into account both high response and acceptable response and recovery times are about 200 and 220 °C, respectively. The dependence of the sensor response on gas concentration is linear in all cases. Minimal propylene glycol, dimethylformamide and formaldehyde gas concentrations, where the perceptible signal was noticed, were 13, 5 and 115 ppm, respectively.
