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Citation Information : International Journal on Smart Sensing and Intelligent Systems. Volume 9, Issue 4, Pages 2,237-2,256, DOI: https://doi.org/10.21307/ijssis-2017-962
License : (CC BY-NC-ND 4.0)
Received Date : 23-September-2016 / Accepted: 03-November-2016 / Published Online: 01-December-2016
Fabricating a sensor for a toxic gas like carbon monoxide has been a constant need in many domestic and industrial applications. Although many sensors are commercially available, research is focused on developing a selective sensor with higher sensitivity, selectivity and low operating temperature. This paper reviews the fabrication, comparison and evaluation of different nanostructured titanium dioxide sensors used in detection. After a brief description of the structural properties of , the article presents sensing mechanism in semiconductor metal oxide sensors. For a reducing agent like , the surface reactions result in the reduction of sensor resistance. The parameters associated with sensor performance are discussed. The article presents a summary of main research findings in this field. Nanostructured morphologies offer better sensing performance and selectivity. The improved performance due to nanostructured is highlighted. The review clarifies the specific role of for the future research.
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