| In recent years, the importance of monitoring combustion processes for fuel efficiency and pollution control has necessitated the development of reliable gas sensors for high temperature in situ detection. Semiconductor gas sensors have been developed for a wide range of reactive gases, but are typically non-selective to any particular gas in gaseous mixtures. The objective of this research was to develop fast-responding solid-state sensors for the selective detection of CO gas at elevated temperatures, as well as to understand and characterize the associated sensing mechanisms.;From preliminary dc electrical resistance measurements, the sensing properties of various semiconducting oxides were investigated, and MoO;The TiO;A sensor device of (TiO;Immittance spectroscopy (IS) was employed to characterize the electrical behavior of TiO... |
