Title :
Nanoplatelet structures of MoO3 for H2 gas sensors
Author :
Balakumar, S. ; Rakkesh, R. Ajay ; Prasad, A.K. ; Dash, S. ; Tyagi, A.K.
Author_Institution :
Nat. Centre for Nanosci. & Nanotechnol., Univ. of Madras, Chennai, India
Abstract :
MoO3 nanostructures were synthesized using optimized sol-gel conditions and thin films were prepared by spin coating onto suitable substrates and tested for hydrogen gas detection. Highly polycrystalline MoO3 nanostructures with orthorhombic symmetry were obtained from phase determination using grazing incidence x-ray diffraction. Morphology determination using field emission scanning electron microscopy revealed different topography for various processing conditions. Comparison of gas sensing studies revealed that molybdenum oxide thin films with nanoplatelet shaped morphology are capable of detecting hydrogen gas at a large range of concentrations, when operated at 200°C with higher sensitivity than other morphologies.
Keywords :
X-ray diffraction; field emission electron microscopy; gas sensors; hydrogen; molybdenum compounds; nanofabrication; nanosensors; nanostructured materials; scanning electron microscopy; semiconductor growth; semiconductor thin films; sol-gel processing; spin coating; thin film sensors; wide band gap semiconductors; H2; MoO3; field emission scanning electron microscopy; grazing incidence X-ray diffraction; hydrogen gas detection; hydrogen gas sensors; molybdenum oxide thin films; morphology determination; nanoplatelet shaped morphology; nanoplatelet structure; orthorhombic symmetry; polycrystalline nanostructures; sol-gel condition; spin coating; temperature 200 degC; Annealing; Chemicals; Coatings; Films; Image edge detection; Lattices; Lead; Gas Sensor; Molybdenum Oxide; Nanostructures;
Conference_Titel :
Nanoscience, Engineering and Technology (ICONSET), 2011 International Conference on
Conference_Location :
Chennai
Print_ISBN :
978-1-4673-0071-1
DOI :
10.1109/ICONSET.2011.6168019
