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Please use this identifier to cite or link to this item: http://etd.iisc.ernet.in/2005/930

Title: Sol-Gel Derived Titania Films And Their Potential Application As Gas Sensor
Authors: Raval, Mehul Chandrakant
Advisors: Rajanna, K
Keywords: Gas Sensors
Titania Films
Sol-Gel Method
Thin Films - Deposition
Sensor Fabrication
Titania Thin Films - Synthesis
Thin Film Deposition
TiO2 Film Synthesis
Ethanol Method (EM)
Isopropanol Method (IM)
Semiconducting Metal-oxides
Titanium Isopropoxide
TiO2 Sol
TiO2 Films
Submitted Date: Dec-2008
Series/Report no.: G22900
Abstract: Today there is a great deal of interest in the development of gas sensors for various applications like monitoring of toxic gases, detection in oil reservoirs, mines, homes etc. Solid-state gas sensors have many advantages over the conventional analytical methods and hence are widely used. Amongst them, semiconducting metal-oxides based sensors are popular due to many advantages like low cost, small size, high sensitivity and long life. The present thesis reports a detailed work of TiO2 (Titania) thin film fabrication based on sol-gel method, study of their crystallization behavior and surface morphology, and characterizing them for alcohol sensing properties Sol-gel method is a wet chemical technique with many advantages over the conventional methods and offers a high degree of versatility to modify the film properties. Titania thin films were made with titanium isopropoxide as the precursor and ethanol and isopropanol as the solvents. Also effect of surfactants(PEG and CTAB) on the sol properties and film properties have experimentally examined. A in-house gas sensor testing setup has been designed and fabricated to characterize the sensors. Sensors with three different electrode configurations and also two different electrode material have been tested. The electrode geometry and material play a significant role on the sensing behavior and results for the same have been discussed.
URI: http://etd.iisc.ernet.in/handle/2005/930
Appears in Collections:Instrumentation and Applied Physics (iap)

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