Tiwari, Ashutosh and Prabaharan, Mani and Pandey, Ravi R. and Li, Songjun (2010) Vacuum-Deposited Thin Film of Aniline–Formaldehyde Condensate/WO3·nH2O Nanocomposite for NO2 Gas Sensor. Journal of Inorganic and Organometallic Polymers and Materials , 20 (2). pp. 380-386. ISSN 1574-1451

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Abstract

A hydrated tungsten oxide (WO3·nH2O)-embedded aniline–formaldehyde condensate (AFC/WO3·nH2O) nanocomposite thin film was prepared on an indium tin oxide (ITO)-coated glass surface via vacuum-deposition technique. The resulting AFC/WO3·nH2O/ITO thin film was characterized using ultraviolet–visible spectroscopy (UV–Vis), Fourier transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD), and electron microscopy (SEM). The composite thin film exhibited a crystalline surface morphology containing nanocrystals of WO3·nH2O with a diameter ranging from 15 to 20 nm. The AFC/WO3·nH2O/ITO film allowed for the low potential detection of NO2 gas at a concentration range from 0 to 9000 ppm. The NO2 gas sensing characteristics were studied by measuring the change in the current with respect to concentration and time. The current of the AFC/WO3·nH2O/ITO film linearly increased with an increase in concentration of NO2 gas with a response of ~20 s.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Springer Verlag.
Uncontrolled Keywords:	Aniline–formaldehyde condensate - Hydrated tungsten oxide - Vacuum-deposition - Thin film - Nanocomposite - NO2 gas sensor
Subjects:	Polymer Science
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	07 Aug 2012 12:18
Last Modified:	07 Aug 2012 12:18
URI:	http://npl.csircentral.net/id/eprint/385

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