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Vol. 213, Issue 6, June 2017, pp. 38-45




Study of Propylene Glycol, Dimethylformamide and Formaldehyde Vapors Sensors Based on MWCNTs/SnO2 Nanocomposites

1 Zaven Adamyan, 1 Artak Sayunts, 1 Vladimir Aroutiounian, 1 Emma Khachaturyan, 1 Arsen Adamyan, 2 Martin Vrnata, 2 Přemysl Fitl and 2 Jan Vlček

1 Yerevan State University, Department of Physics of Semiconductors and Microelectronics, Center of Semiconductor Devices and Nanotechnologies, 1 A. Manoukian, 0025 Yerevan, Armenia
2 University of Chemistry and Technology, Department of Physics and Measurement Technology, Technick? 5, 166 28 Prague 6, Czech Republic
1 Tel.: +37460710311, fax: +37460710355

1 E-mail: kisahar@ysu.am


Received: 22 May 2017 /Accepted: 22 June 2017 /Published: 30 June 2017

Digital Sensors and Sensor Sysstems


Abstract: We present results of our 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 derived using hydrothermal synthesis and sol-gel methods. Investigations of response/recovery characteristics in the 50-300 oC 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 oC, respectively. A sensor response dependence on gas concentration in all cases is linear. The minimal propylene glycol and dimethylformamide gas concentrations at which the perceptible signal was registered by us were 13 ppm and 5 ppm, respectively.


Keywords: MWCNTs/SnO2, Gas, Vapor, Sensor, Dimethylformamide, Propylene glycol, Formaldehyde.


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