New Approaches to Improving Sensing Performance
For desired sensing performances of the metal oxides-based gas sensors, emerged novel techniques including photoactivated (e.g., UV) gas sensing, surface plasmon resonance (SPR)-enhanced gas sensing, pulse-driven gas sensing and field-effect transistor (FET) gas sensors have been applied to develop sensors with higher sensitivity, faster response–recovery speed and lower limit of detection (LOD). By contrast, these new methods can simplify the reaction process of gas sensors and controllable detection of target gases of traditional gas sensors. In addition, with the development of nanodevices, visual gas sensors can produce enormous sensing proficiency and become a new development direction of gas sensors. In this chapter, the recent progress of new techniques and approaches for gas sensing is summarized and discussed.
KeywordsMetal oxides gas sensors Optical gas sensing Field-effect transistor Pulse-driven gas sensing