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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Enhanced NO 2 gas sensing properties of WO 3 nanorods encapsulated with ZnO
TL;DR: In this article, the influence of the encapsulation of WO3 nanorods with ZnO on the NO2 gas sensing properties was examined, and the significant enhancement in the response of wO3-core/ZnO-shell nanorod sensors can be accounted for based on the space charge model.
Journal ArticleDOI
Transparent metal-oxide nanowires and their applications in harsh electronics
TL;DR: In this article, the authors provide a comprehensive review on the recent advances in high-performance transparent metal-oxide nanostructures and their corresponding device applications in harsh electronics. And they provide a brief introduction of different methodologies for the controllable synthesis of high-quality metaloxide nanowires, followed by an evaluation of the physical limitations of these nanomaterials.
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An emphatic study on role of spill-over sensitization and surface defects on NO2 gas sensor properties of ultralong ZnO@Au heterojunction NRs
TL;DR: In this article, the ultralong ZnO@Au heterojunction NRs were synthesized using a facile wet-chemical approach by in-situ reduction process.
Journal ArticleDOI
Highly sensitive and selective acetone sensor based on three-dimensional ordered WO3/Au nanocomposite with enhanced performance
Xinran Zhang,Biao Dong,Wei Liu,Xiangyu Zhou,Min Liu,Xueke Sun,Jiekai Lv,Liangle Zhang,Wen Xu,Xue Bai,Lin Xu,Svetlana Mintova,Hongwei Song +12 more
TL;DR: In this article, an acetone sensor based on three-dimensional inverse opal (3DIO) tungsten oxide composite modified with Au (WO3/Au) was obtained through a simple sacrificial template synthesis, which provided more active sites with macropore architecture.
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Ethanol sensing properties of porous ZnO spheres via hydrothermal route
TL;DR: In this paper, ZnO spheres composed of porous flakes were prepared by template-free, economical hydrothermal method combined with heat treatment, and the high-density pores with the size in tens of nanometers were found distributed through each piece of the flake.
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.