Sensitivity to Ethanol Vapour of Thin Films SnO2 Doped with Fluorine
Tin dioxide thin films were obtained by centrifuging. Annealing of samples was carried out in a muffle furnace at a temperature of 400 °C for 15 min, 3, 6 and 12 h. The surface resistance of the films was measured by four-force method. The sensitivity to ethanol vapour was determined by experimental setup that allows measurements in the range from room temperature to 300 °C. There is a change in the acidity of the solution with the addition of ammonium fluoride. To take into consideration this change in acidity, three batches of solutions were prepared: one example without additives, another one ‒ with the addition of ammonium fluoride and the last one ‒ with the addition of ammonium hydroxide. Films synthesized from a film-forming solution containing NH4F have less resistance than films obtained from solutions that do not contain ammonium fluoride. This confirms the presence of fluorine ions in the films as additional sources of free charge carriers. It is found that the pH-indicator of the film-forming solution does not affect the surface resistance of the synthesized SnO2 films. Annealing of fluoride doped films leads to an increase in surface resistance by two orders of magnitude, which is associated with the removal of fluorine from the films and the formation of a large number of defects. Further annealing leads to a decrease in surface resistance, which seems to be associated with a decrease in defects. It is shown that the change in the hydrogen index of the film-forming solution leads to the formation of films with a thermally stable sensitivity to ethanol vapour.
(2). Lim Kiwon, Choi Pyungho, Kim Sangsub, Kim Hyunki, Kim Minsoo, Lee Jeonghyun, Hyeon Younghwan, Koo Kwangjun, Choi Byoungdeog, J. Nanosci. Nanotechno. 18 (2018) 5913–5918. Crossref
(3). Kim Tae Kyoung, Yoon Yeo Jin, Oh Seung Kyu, Cha Yu-Jung, Hong In Yeol, Cho Moon Uk, Hong Chan-Hwa, Choi Hong Kyw, Kwak Joon Seop, J. Nanosci. Nanotechno. 18 (2018) 6106–6111. Crossref
(4). Kai Ling Zhou, Hao Wang, Jin Ting Jiu, Jing Bing Liu, Hui Yan, Katsuaki Suganuma, Chem. Eng. J. 345 (2018) 290–299. Crossref
(5). A.S. Ismail, M.H. Mamat, M.F. Malek, M.M. Yusoff, R. Mohamed, N.D. Md. Sin, A.B. Suriani, M. Rusop, Mat. Sci. Semicon. Proc. 81 (2018) 127–138. Crossref
(6). Xianghong Liu, Tiantian Ma, Yongshan Xu, Li Sun, Lingli Zheng, Oliver G. Schmidt, Jun Zhang, Sensor. Actuat. B-Chem. 264 (2018) 92– 99. Crossref
(7). Junping Liu, Yanzhe Wang, Lianqiang Wang, Hongwei Tian, Yi Zeng, Mater. Lett. 221 (2018) 57–61. Crossref
(8). Dongzhi Zhang, Dongyue Wang, Xiaoqi Zong, Guokang Dong, Yong Zhang, Sensor. Actuat. B-Chem. 262 (2018) 531–541. Crossref
(9). Manjeet Kumar, Vishwa Bhatt, A.C. Abhyankar, Joondong Kim, Akshay Kumar, Sagar H. Patil, Ju-Hyung Yun, Sci. Rep. 8 (8079) (2018). Crossref
(10). A.Y. Korol’chenko, D.A. Korol’chenko. Pozharovzryvoopasnost’ veshhestv i materialov i sredstva ih tushenija [Fire and explosion hazard of substances and materials and their suppression]. Moscow, Poznauka association, 2004 (in Russian).
(11). GOST 12.1.007-76. Sistema standartov bezopasnosti truda, Opasnye veshhestva: klassifikacija i obshhie trebovanija bezopasnosti [State standart 12.1.007-76 System of occupational safety standards, Hazardous substances: classification and general safety requirements]. Moscow (in Russian).
(12). N.B. Shcherbakova, P.V. Nacharov, Yu.K. Yanov. Analysis of the gas compositions of exhaled air in the diagnosis of diseases. Rossijskaja otorinolaringologija [Russian otorhinolaryngology] 4 (2005) 126–132 (in Russian).
(13). E.A. Dmitrieva, D.M. Mukhamedshina, N.B. Beisenkhanov, K.A. Mit’, Glass physics and chemistry 40 (2014) 31–36. Crossref
(14). D.M. Mukhamedshina, N.B. Beisenkhanov, K.A. Mit, E.A. Dmitrieva, N.A. Medetov. Application of thermal and plasma treatments for modification of SnO2 thin films properties. Perspektivnye Materialy [Perspective materials] 1 (2012) 35–42 (in Russian).
(15). E.A. Dmitriyeva. Tonkie plenki oksida olova, poluchennye zol’-gel’ metodom. Sbornik statej [Tin dioxide thin films obtained by the sol-gel method. Collection of articles]. LAP Lambert Academic Publishing RU, 2018, 87 p. (in Russian).
Copyright (c) 2019 Eurasian Chemico-Technological Journal
This work is licensed under a Creative Commons Attribution 4.0 International License.
You are free to: Share — copy and redistribute the material in any medium or format. Adapt — remix, transform, and build upon the material for any purpose, even commercially.
Eurasian Chemico-Technological Journal applies a Creative Commons Attribution 4.0 International License to articles and other works we publish.
Subject to the acceptance of the Article for publication in the Eurasian Chemico-Technological Journal, the Author(s) agrees to grant Eurasian Chemico-Technological Journal permission to publish the unpublished and original Article and all associated supplemental material under the Creative Commons Attribution 4.0 International license (CC BY 4.0).
Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.