Heterostructure/Pore-Size Ordered SnO2 Porous Films and Multiphysical Mechanism for Rapid Detection of Ethanol

In the work, heterostructure and heteropore size based on SnO 2 are fabricated by the 2-D colloidal crystal template method, and the effects of morphological richness and pore size of ordered porous films on gas-sensitive properties were systematically investigated. The sensor based on ordered porou...

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Bibliographic Details
Published inIEEE transactions on instrumentation and measurement Vol. 71; pp. 1 - 9
Main Authors Yuan, Zhenyu, Luo, Shan, Zuo, Kaiyuan, Li, Jingfeng, Meng, Fanli
Format Journal Article
LanguageEnglish
Published New York IEEE 2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Atmospheric modeling
Colloidal crystals
Density distribution
Ethanol
Gas detectors
Gas-sensing mechanism
heterostructure/pore size
Heterostructures
Morphology
multiphysics field coupling
ordered porous film
Pore size
quick response
Sensitivity
Temperature sensors
Tin dioxide
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Summary:In the work, heterostructure and heteropore size based on SnO 2 are fabricated by the 2-D colloidal crystal template method, and the effects of morphological richness and pore size of ordered porous films on gas-sensitive properties were systematically investigated. The sensor based on ordered porous films possesses excellent fast response, stability, and detection limit down to 1 ppm to ethanol. To explain the sensing mechanism, a novel multiphysics field-coupled analysis method, such as electrical and hydrodynamic, was used to quantify the gas adsorption on the gas-sensitive film surface and the internal current density distribution. The results demonstrate that the simulation can explain the experimental phenomena well.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2022.3193983