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Optical Hydrogen Sensing Properties of Nanostructured Pd/MoO3 Films
- Source :
- Sensor Letters. 9:16-20
- Publication Year :
- 2011
- Publisher :
- American Scientific Publishers, 2011.
-
Abstract
- In this work, molybdenum trioxide (MoO3) nanostructured films were deposited onto quartz substrates via thermal evaporation of MoO3 powder. Subsequently, a catalytic palladium (Pd) layer was deposited onto MoO3 layer by e-beam evaporation. Scanning electron microscopy (SEM) revealed MoO3 nanorods grown in various directions and X-ray diffraction (XRD) confirmed the growth of orthorhombic MoO3. Optical hydrogen (H2) sensing performance of nanostructured Pd/MoO3 films were investigated at a concentration between 0.06-1%. It was observed that the nanostructured films exhibited excellent gasochromic characteristics and remarkable absorbance changes in near infrared (NIR) wavelength range (750-1000 nm) when exposed to H2. Pd/MoO3 T90% response and recovery towards 0.06% H2 were 150 and 300 s, respectively. The film operating temperature was also found as low as 120 °C.
- Subjects :
- Materials science
Hydrogen
Scanning electron microscope
Analytical chemistry
chemistry.chemical_element
Evaporation (deposition)
Atomic and Molecular Physics, and Optics
Molybdenum trioxide
Absorbance
chemistry.chemical_compound
chemistry
Orthorhombic crystal system
Nanorod
Electrical and Electronic Engineering
Palladium
Subjects
Details
- ISSN :
- 1546198X
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- Sensor Letters
- Accession number :
- edsair.doi...........9f7003f81d65edcfb522bd76fc4f953a