Investigation of Rapid Gas-Sensitive Properties Degradation of ZnO–SnO<sub>2</sub> Thin Films Grown on the Glass Substrate

ZnO–SnO<sub>2</sub> films with a thickness of up to 120 nm have been prepared on glass substrates by pyrolysis at 550 °C of three spin-coated organic precursors films. Films of four compositions were obtained on glass substrates. The prepared films were characterized by SEM, XRD, and XPS...

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Main Authors:	Victor V. Petrov, Ekaterina M. Bayan, Soslan A. Khubezhov, Yuri N. Varzarev, Maria G. Volkova
Format:	Article
Language:	English
Published:	MDPI AG 2020-06-01
Series:	Chemosensors
Subjects:	ZnO SnO<sub>2</sub> thin film CO sensor gas-sensitive properties
Online Access:	https://www.mdpi.com/2227-9040/8/2/40

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spelling	doaj-ca4b779b0c9848539a550c41a5c0516e2020-11-25T03:32:54ZengMDPI AGChemosensors2227-90402020-06-018404010.3390/chemosensors8020040Investigation of Rapid Gas-Sensitive Properties Degradation of ZnO–SnO<sub>2</sub> Thin Films Grown on the Glass SubstrateVictor V. Petrov0Ekaterina M. Bayan1Soslan A. Khubezhov2Yuri N. Varzarev3Maria G. Volkova4Institute of Nanotechnologies, Electronics, and Equipment Engineering, Southern Federal University, 347928 Taganrog, RussiaDepartment of Chemistry, Southern Federal University, 344090 Rostov-on-Don, RussiaDepartment of Physics, North-Ossetian State University, 362025 Vladikavkaz, RussiaInstitute of Nanotechnologies, Electronics, and Equipment Engineering, Southern Federal University, 347928 Taganrog, RussiaDepartment of Chemistry, Southern Federal University, 344090 Rostov-on-Don, RussiaZnO–SnO<sub>2</sub> films with a thickness of up to 120 nm have been prepared on glass substrates by pyrolysis at 550 °C of three spin-coated organic precursors films. Films of four compositions were obtained on glass substrates. The prepared films were characterized by SEM, XRD, and XPS analysis. Electrophysical studies have shown that the activation energy of the temperature conductivity for all films is equal to 0.75 eV. While the gas-sensitive characteristics by CO treatment in low concentrations at a temperature of 200–300 °C was studied, their rapid degradation was found. Studies using the XPS method have shown that ZnO–SnO<sub>2</sub> films contain sodium, which is diffused from the soda-lime glass substrate during the film formation. Studies of XPS spectra after CO treatment have shown that the film surface is almost 50% composed of adsorbed water molecules and OH groups. OH groups are part of the sodium, tin, and zinc hydroxides formed on the surface. In addition, zinc hydrocarbonates are formed on the surface of the films. The detected insoluble compounds lead to the degradation of gas-sensitive properties of ZnO–SnO<sub>2</sub> films.https://www.mdpi.com/2227-9040/8/2/40ZnOSnO<sub>2</sub>thin filmCO sensorgas-sensitive properties
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Victor V. Petrov Ekaterina M. Bayan Soslan A. Khubezhov Yuri N. Varzarev Maria G. Volkova
spellingShingle	Victor V. Petrov Ekaterina M. Bayan Soslan A. Khubezhov Yuri N. Varzarev Maria G. Volkova Investigation of Rapid Gas-Sensitive Properties Degradation of ZnO–SnO<sub>2</sub> Thin Films Grown on the Glass Substrate Chemosensors ZnO SnO<sub>2</sub> thin film CO sensor gas-sensitive properties
author_facet	Victor V. Petrov Ekaterina M. Bayan Soslan A. Khubezhov Yuri N. Varzarev Maria G. Volkova
author_sort	Victor V. Petrov
title	Investigation of Rapid Gas-Sensitive Properties Degradation of ZnO–SnO<sub>2</sub> Thin Films Grown on the Glass Substrate
title_short	Investigation of Rapid Gas-Sensitive Properties Degradation of ZnO–SnO<sub>2</sub> Thin Films Grown on the Glass Substrate
title_full	Investigation of Rapid Gas-Sensitive Properties Degradation of ZnO–SnO<sub>2</sub> Thin Films Grown on the Glass Substrate
title_fullStr	Investigation of Rapid Gas-Sensitive Properties Degradation of ZnO–SnO<sub>2</sub> Thin Films Grown on the Glass Substrate
title_full_unstemmed	Investigation of Rapid Gas-Sensitive Properties Degradation of ZnO–SnO<sub>2</sub> Thin Films Grown on the Glass Substrate
title_sort	investigation of rapid gas-sensitive properties degradation of zno–sno<sub>2</sub> thin films grown on the glass substrate
publisher	MDPI AG
series	Chemosensors
issn	2227-9040
publishDate	2020-06-01
description	ZnO–SnO<sub>2</sub> films with a thickness of up to 120 nm have been prepared on glass substrates by pyrolysis at 550 °C of three spin-coated organic precursors films. Films of four compositions were obtained on glass substrates. The prepared films were characterized by SEM, XRD, and XPS analysis. Electrophysical studies have shown that the activation energy of the temperature conductivity for all films is equal to 0.75 eV. While the gas-sensitive characteristics by CO treatment in low concentrations at a temperature of 200–300 °C was studied, their rapid degradation was found. Studies using the XPS method have shown that ZnO–SnO<sub>2</sub> films contain sodium, which is diffused from the soda-lime glass substrate during the film formation. Studies of XPS spectra after CO treatment have shown that the film surface is almost 50% composed of adsorbed water molecules and OH groups. OH groups are part of the sodium, tin, and zinc hydroxides formed on the surface. In addition, zinc hydrocarbonates are formed on the surface of the films. The detected insoluble compounds lead to the degradation of gas-sensitive properties of ZnO–SnO<sub>2</sub> films.
topic	ZnO SnO<sub>2</sub> thin film CO sensor gas-sensitive properties
url	https://www.mdpi.com/2227-9040/8/2/40
work_keys_str_mv	AT victorvpetrov investigationofrapidgassensitivepropertiesdegradationofznosnosub2subthinfilmsgrownontheglasssubstrate AT ekaterinambayan investigationofrapidgassensitivepropertiesdegradationofznosnosub2subthinfilmsgrownontheglasssubstrate AT soslanakhubezhov investigationofrapidgassensitivepropertiesdegradationofznosnosub2subthinfilmsgrownontheglasssubstrate AT yurinvarzarev investigationofrapidgassensitivepropertiesdegradationofznosnosub2subthinfilmsgrownontheglasssubstrate AT mariagvolkova investigationofrapidgassensitivepropertiesdegradationofznosnosub2subthinfilmsgrownontheglasssubstrate
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Investigation of Rapid Gas-Sensitive Properties Degradation of ZnO–SnO<sub>2</sub> Thin Films Grown on the Glass Substrate

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