Sensors based on tin dioxide thin films for the detection of pre-explosive hydrogen concentrations
| Autor: | Sergey N. Nesov, N. A. Davletkildeev, N.V. Sergeychenko, P. M. Korusenko, N. K. Maksimova, A. A. Biryukov, S. V. Kim, E.Y. Sevastyanov, D. V. Sokolov, E. V. Chernikov |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Nanostructure Annealing (metallurgy) Analytical chemistry chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences symbols.namesake chemistry.chemical_compound Materials Chemistry Electrical and Electronic Engineering Thin film Instrumentation Tin dioxide Metals and Alloys Sputter deposition 021001 nanoscience & nanotechnology Condensed Matter Physics Nanocrystalline material 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry symbols 0210 nano-technology Raman spectroscopy Platinum |
| Zdroj: | Sensors and Actuators B: Chemical. 341:130020 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2021.130020 |
| Popis: | In this work, novel semiconductor sensors were developed for detecting high pre-explosive concentrations of H2 (0.1–2.5 vol%) with high selectivity and stability. The sensors were based on thin (∼100 nm) nanocrystalline SnO2 films produced by magnetron sputtering of dispersed Pt and Pd layers deposited on the surface and addition of 13–14 at% Pt in the bulk. Studies on their nanostructure, composition, electrical properties, and gas-sensitive characteristics were carried out. X-ray photoelectron and Raman spectroscopies revealed that in the process of stabilizing annealing in Pt/Pd/SnO2:Sb,Pt film platinum introduced into the bulk segregates on the surface of the SnO2 microcrystals in the form of Pt° metal clusters and dispersed Pt2+ ions. The dispersed Pt2+ ions form bonds with lattice oxygen and contribute to the overlap of conduction channels. In the sensor subjected to annealing at T a n 1 =723 K and T a n 2 =873 K, the optimal situation is realized when under the action of low (n |
| Databáze: | OpenAIRE |
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