Abstract
The vacuum-deposited thin film of hydrated tungsten oxide (WO3·nH2O) embedded poly(o-phenylenediamine) (PoPD/ WO3·nH2O) nanocomposite was fabricated on an indium tin oxide (ITO) coated glass surface for potential NO2 gas sensor application. The resulting PoPD/WO3·nH2O/ITO thin film was characterized using ultraviolet-visible spectroscopy (UV-vis), Fourier transform infrared spectroscopy (FT-IR), X-ray diffractometry (XRD), and electron microscopy (SEM). The composite thin film exhibited a crystalline surface morphology containing nanocrystalls of WO3·nH2O with a diameter ranging from 5 to 10nm. The PoPD/WO3·nH2O/ITO film allowed for the low potential detection of NO2 gas at concentration range from 0 to 1800 ppm. The NO2 gas sensing characteristics were studied by measuring change in the current with respect to concentration and time. The current of the PoPD/WO3·nH2O/ITO film was linearly increased with an increase in concentration of NO2 gas with a response of ˜9 s.
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Tiwari, A., Li, S. Vacuum-Deposited Poly(o-phenylenediamine)/WO3·nH2O Nanocomposite Thin Film for NO2 Gas Sensor. Polym J 41, 726–732 (2009). https://doi.org/10.1295/polymj.PJ2009059
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DOI: https://doi.org/10.1295/polymj.PJ2009059
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