Sol-gel deposition of nanocrystalline TiO2 thin films useful for hydrogen gas sensing application

The development of sensors with high sensitivity and rapid response is a serious environmental issue. During last few decades, several kinds of gas sensors have been developed based on different sensing materials: metal-oxide semiconductors, intrinsically conducting polymers, conducting polymer composites, metal-oxide/polymer composites and other novel materials. Hydrogen is a potential alternative fuel for automobiles and can be converted into electricity in fuel cells. But hydrogen sensors are needed as hydrogen forms an explosive mixture due to its leakage.