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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SnO2 thin films modified by the SnO2–Au nanocomposites: Response to reducing gases
TL;DR: In this paper, the influence of the surface modification by the SnO2-Au nanocomposites on conductivity response to such reducing gases as CO and H2 has been analyzed.
Journal ArticleDOI
Low resistive gallium doped nanocrystalline zinc oxide for gas sensor application via sol–gel process
Yue Hou,Ahalapitiya H. Jayatissa +1 more
TL;DR: In this article, the effect of low concentration of Ga doping on the performance of ZnO thin-film based gas sensors was investigated, where different concentrations of Ga were added to the sol-gel mixture for systematic comparison of doping effect.
Journal ArticleDOI
Microsensors in Dynamic Backgrounds: Toward Real-Time Breath Monitoring
Kurt D. Benkstein,Baranidharan Raman,Christopher B. Montgomery,Carlos J. Martinez,Steve Semancik +4 more
TL;DR: In this paper, a microelectromechanical system (MEMS) microsensor array with temperature-controlled chemi-resistive elements for use as a noninvasive clinical diagnostic tool to detect the presence or absence of trace amounts of disease biomarkers in simulated breath samples.
Journal ArticleDOI
Toward new gas-analytical multisensor chips based on titanium oxide nanotube array
Fedor S. Fedorov,Michail Yu. Vasilkov,Michail Yu. Vasilkov,Andrey Lashkov,A. S. Varezhnikov,Dirk Fuchs,Christian Kübel,Michael Bruns,Martin Sommer,Victor V. Sysoev,Victor V. Sysoev +10 more
TL;DR: The results indicate that the titania nanotubes are a promising material platform for novel cost-effective and powerful gas-analytical multisensor units.
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Au decoration of vertical hematite nanotube arrays for further selective detection of acetone in exhaled breath
Do Hong Kim,Taehoon Kim,Woonbae Sohn,Jun Min Suh,Young Seok Shim,Ki Chang Kwon,Kootak Hong,Seokhoon Choi,Hyung Gi Byun,Jong Heun Lee,Ho Won Jang +10 more
TL;DR: In this article, a facile electrochemical anodization method and self-agglomeration of Au films was used to synthesize hematite nanotubes decorated with Au nanoparticles.
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.