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Volume 26 - ICOP & ICPET 2020
ICOP & ICPET _ INPC _ ICOFS 2020, 26 - ICOP & ICPET 2020: 1069-1072 |
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Hosseini M, Ranjbar M. Fabrication of MoO3 Film by Flame Vapor Deposition for Plasmonic Hydrogen Gas Sensing Application. ICOP & ICPET _ INPC _ ICOFS 2020; 26 :1069-1072
URL: http://opsi.ir/article-1-2191-en.html
URL: http://opsi.ir/article-1-2191-en.html
1- Department of Physics, Isfahan University of Technology, Isfahan
Abstract: (1310 Views)
Nowadays, the gasochromic coloration of transition metal oxide has become more interesting for optical hydrogen sensing. This paper reports hydrogen sensing by Pd/MoO3 films deposited on glass substrates by an atmospheric flame technique at substrates which were kept at room temperature. A β-MoO3 crystallite phase was detected for the flame deposited oxide layers. When Pd/MoO3 films were exposed to hydrogen at 150 ° C, the sample’s color changes to pale blue. After hydrogenation, no structural phase change is observed in the X-ray diffraction pattern. FESEM images shows a web like agglomeration of small particles (<10 nm). A broad LSPR absorption peak appeared in NIR region due to surface plasmon resonance after hydrogenation. The plasmonic absorption band of molybdenum oxide shifts to shorter wavelengths as the hydrogen gas concentration increases. This spectral variation of molybdenum oxide can be used as a plasmonic hydrogen gas sensor.
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