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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Influence of oxygen backgrounds on hydrogen sensing with SnO2 nanomaterials
TL;DR: In this article, the influence of different oxygen backgrounds on the sensing of hydrogen with SnO 2 nanomaterials was investigated and a model was proposed based on two hydrogen reaction mechanisms at the surface of tin oxide that can take place simultaneously.
Journal ArticleDOI
Flexible highly sensitive hydrogen gas sensor based on a TiO2 thin film on polyimide foil
O. Krško,Tomas Plecenik,Tomas Roch,Branislav Grančič,Leonid Satrapinskyy,M. Truchlý,P. Ďurina,M. Gregor,Peter Kúš,Andrej Plecenik +9 more
TL;DR: In this article, a flexible semiconductor gas sensor of hydrogen was presented on 38μm thick Kapton ® polyimide foil, based on a TiO 2 thin film with platinum interdigital electrodes on top.
Journal ArticleDOI
A theoretical investigation of the power-law response of metal oxide semiconductor gas sensors Ι: Schottky barrier control
TL;DR: In this article, a theoretical investigation of the power-law response of metal oxide semiconductor gas sensors is presented, which is characterized by a linear dependence of the sensor resistance on gas pressure or concentration in double-logarithmic plots.
Journal ArticleDOI
Transition metal dichalcogenides-based flexible gas sensors
TL;DR: This review aims at summarizing recent progress in energy-efficient flexible gas sensors by utilizing 2D transition metal dichalcogenides (TMDCs) materials by highlighting the main concepts and different approaches for optimizing the gas sensing characteristics on flexible sensing platforms.
Journal ArticleDOI
CMOS monolithic metal-oxide sensor system comprising a microhotplate and associated circuitry
Markus Graf,Diego Barrettino,M. Zimmermann,Andreas Hierlemann,Henry Baltes,S. Hahn,Nicolae Barsan,Udo Weimar +7 more
TL;DR: In this paper, a gas sensor system fabricated in industrial CMOS technology is presented, which includes, for the first time, a microhotplate and the necessary driving and control circuitry on a single chip.
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.