Journal ArticleDOI
Conduction Model of Metal Oxide Gas Sensors
Nicolae Barsan,Udo Weimar +1 more
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TLDR
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.Abstract:
Tin dioxide is a widely used sensitive material for gas sensors. Many research and development groups in academia and industry are contributing to the increase of (basic) knowledge/(applied) know-how. However, from a systematic point of view the knowledge gaining process seems not to be coherent. One reason is the lack of a general applicable model which combines the basic principles with measurable sensor parameters. The approach in the presented work is to provide a frame model that deals with all contributions involved in conduction within a real world sensor. For doing so, one starts with identifying the different building blocks of a sensor. Afterwards their main inputs are analyzed in combination with the gas reaction involved in sensing. At the end, the contributions are summarized together with their interactions. The work presented here is one step towards a general applicable model for real world gas sensors.read more
Citations
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Advances and new directions in gas-sensing devices
TL;DR: In this paper, a detailed review of nanodimensioned materials has been provided which serves to update progress made along these lines, and highlights trends suggesting directions for future progress.
Journal ArticleDOI
Instability of metal oxide-based conductometric gas sensors and approaches to stability improvement (short survey)
Ghenadii Korotcenkov,Beongki Cho +1 more
TL;DR: In this paper, modern views on the reasons of time instability of gas sensors parameters, as well as approaches which could be used for the improvement of this important sensor's parameter, are summarized.
Journal ArticleDOI
An overview: Facet-dependent metal oxide semiconductor gas sensors
Xing Gao,Tong Zhang +1 more
TL;DR: In this article, a review of recent efforts on engineering crystal structures with exposed high-energy facets of MOS nanomaterials and their improved gas-sensitive performance is provided, focusing on six kinds of common gas sensitive MOS including ZnO, SnO, TiO2, α-Fe2O3, NiO and Cu2O.
Journal ArticleDOI
Carbon Dioxide (CO2) Sensors for the Agri-food Industry—A Review
TL;DR: In this article, the authors present a broad overview of the innovative research on the development of sensors, sensing mechanisms, and their characteristics, and outline future possibilities for use of CO2 sensors.
Journal ArticleDOI
Mechanism Study of ZnO Nanorod-Bundle Sensors for H2S Gas Sensing
Jae-Hyun Kim,Kijung Yong +1 more
TL;DR: In this paper, the H2S gas-sensing properties of ZnO nanorod bundles and an investigation of their gas sensing mechanism were reported. But, the results were limited to the case of air containing dilute H 2S gas (50 ppm) at sensing temperatures ≤ 500 °C.
References
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Book
The surface science of metal oxides
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.
Book
The Chemical Physics of Surfaces
S. R. Morrison,Peder J. Estrup +1 more
TL;DR: In this paper, the authors present an approach for the reconstruction of the surface of a solid with respect to the Fermi energy in the band diagram of the solid and its surface.
Journal ArticleDOI
Interactions of tin oxide surface with O2, H2O AND H2
TL;DR: In this paper, the authors investigated the interaction of tin oxide surface with oxygen, water vapor, and hydrogen using temperature-programmed desorption (TPD) chromatograms of oxygen.