Abstract
Indium oxide (In2O3) and platinum doped (in situ method) indium oxide (Pt-In2O3) nanoparticles were prepared by surfactant assisted hydrothermal route followed by calcination at 400°C. The X-ray diffraction data revealed that the average size of the nanoparticles was around 15 nm and the transmission electron microscopic investigation showed that the nanoparticles were formed as short nanorods. The oxygen sensing ability of the sensors fabricated using both undoped and Pt-doped In2O3 was found to be higher in the case of later and the maximum was observed at 270°C. Both the sensors showed a linear response to oxygen partial pressures in the measured range from 2.5% to 20%.
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