Tiwari, Ashutosh and Li, Songjun (2009) Vacuum-Deposited Poly(o-phenylenediamine)/WO3 center dot nH(2)O Nanocomposite Thin Film for NO2 Gas Sensor. Polymer Journal , 41 (9). pp. 726-732. ISSN 1349-0540

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Abstract

The vacuum-deposited thin film of hydrated tungsten oxide (WO3 center dot nH(2)O) embedded poly(o-phenylenediamine) (PoPD/WO3 center dot nH(2)O) nanocomposite was fabricated on an indium tin oxide (ITO) coated glass surface for potential NO2 gas sensor application. The resulting PoPD/WO3 center dot nH(2)O/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 center dot nH(2)O with a diameter ranging from 5 to 10nm. The PoPD/WO3 center dot nH(2)O/ITO film allowed for the low potential detection of NO2 gas at concentration range from 0 to 1800ppm. 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 center dot nH(2)O/ITO film was linearly increased with an increase in concentration of NO2 gas with a response of similar to 9s.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s The Society of Polymer Science.
Subjects:	Polymer Science
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	22 Oct 2012 12:38
Last Modified:	22 Oct 2012 12:38
URI:	http://npl.csircentral.net/id/eprint/749

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