Metal oxide gas sensors: Sensitivity and influencing factors
TLDR
A brief review of changes of sensitivity of conductometric semiconducting metal oxide gas sensors due to the five factors: chemical components, surface-modification and microstructures of sensing layers, temperature and humidity.Abstract:
Conductometric semiconducting metal oxide gas sensors have been widely used and investigated in the detection of gases. Investigations have indicated that the gas sensing process is strongly related to surface reactions, so one of the important parameters of gas sensors, the sensitivity of the metal oxide based materials, will change with the factors influencing the surface reactions, such as chemical components, surface-modification and microstructures of sensing layers, temperature and humidity. In this brief review, attention will be focused on changes of sensitivity of conductometric semiconducting metal oxide gas sensors due to the five factors mentioned above.read more
Citations
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References
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Book
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TL;DR: In this paper, the electronic structure of transition metal-oxide surfaces is described. But the electronic structures of non-transition metaloxide surfaces have not been discussed, and they are not considered in this paper.
Journal ArticleDOI
Conduction Model of Metal Oxide Gas Sensors
Nicolae Barsan,Udo Weimar +1 more
TL;DR: In this article, the authors provide a frame model that deals with all contributions involved in conduction within a real world sensor, and then summarize the contributions together with their interactions in a general applicable model for real world gas sensors.
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The surface and materials science of tin oxide
Matthias Batzill,Ulrike Diebold +1 more
TL;DR: A review of surface science studies of single crystal surfaces, but selected studies on powder and polycrystalline films are also incorporated in order to provide connecting points between surface sciences studies with the broader field of materials science of tin oxide as discussed by the authors.
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Metal oxide-based gas sensor research: How to?
TL;DR: In this article, the state of the art in the field of experimental techniques possible to be applied to the study of conductometric gas sensors based on semiconducting metal oxides is reviewed.
Journal ArticleDOI
Ammonia sensors and their applications - a review
TL;DR: In this article, a survey of sensors and sensor systems for gaseous ammonia is presented, where the authors present different application areas for ammonia sensors or measurement systems and different techniques available for making selective ammonia sensing devices.