Temperature dependence of gas sensing behaviour of TiO{sub 2} doped PANI composite thin films

Journal Article · Thu Apr 24 04:00:00 EDT 2014 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4872722· OSTI ID:22271011

Srivastava, Subodh; Sharma, Preetam; Singh, M.; Vijay, Y. K. ^[1]; Sharma, S. S. ^[2]; Sharma, Vinay; Rajura, Rajveer Singh ^[3]

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1. Thin Film and Membrane Science Lab, Department of Physics, University of Rajasthan, Jaipur- 302004 (India)
2. Department of Physics, Govt. Women Engineering College, Ajmer-305002 (India)
3. Centre for Converging Technology, University of Rajasthan, Jaipur-302004 (India)

In the present work we have reported the effect of temperature on the gas sensing properties of TiO{sub 2} doped PANI composite thin film based chemiresistor type gas sensors for hydrogen gas sensing application. PANI and TiO{sub 2} doped PANI composite were synthesized by in situ chemical oxidative polymerization of aniline at low temperature. The electrical properties of these composite thin films were characterized by I-V measurements as function of temperature. The I-V measurement revealed that conductivity of composite thin films increased as the temperature increased. The changes in resistance of the composite thin film sensor were utilized for detection of hydrogen gas. It was observed that at room temperature TiO{sub 2} doped PANI composite sensor shows higher response value and showed unstable behavior as the temperature increased. The surface morphology of these composite thin films has also been characterized by scanning electron microscopy (SEM) measurement.

• OSTI ID: 22271011
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1591; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANILINE
COMPOSITE MATERIALS
DETECTION
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
HYDROGEN
MORPHOLOGY
OXIDATION
POLYMERIZATION
SCANNING ELECTRON MICROSCOPY
SENSORS
SURFACES
TEMPERATURE DEPENDENCE
THIN FILMS
TITANIUM OXIDES