Micro gas preconcentrator in porous silicon filled with a carbon absorbent

This paper presents the development of a gas preconcentrator based on a micro-channel in porous silicon filled with carbon nanopowders by a micro-fluidic process. The particularity of this device is its applicability in the fields of atmospheric pollution monitoring by targeting VOCS (volatiles orga...

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Published inSensors and actuators. B, Chemical Vol. 148; no. 2; pp. 610 - 619
Main Authors Camara, E.H.M., Breuil, P., Briand, D., Guillot, L., Pijolat, C., de Rooij, N.F.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.07.2010
Elsevier
Subjects
Absorbents
Adsorbents
Air pollution
Carbon
Chemical and Process Engineering
Devices
Engineering Sciences
Gas sensors
Micro-channel
Nanomaterials
Nanostructure
Porous silicon
Preconcentrator
Preconcentrator
Gas sensors
Micro-channel
Porous silicon
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Summary:This paper presents the development of a gas preconcentrator based on a micro-channel in porous silicon filled with carbon nanopowders by a micro-fluidic process. The particularity of this device is its applicability in the fields of atmospheric pollution monitoring by targeting VOCS (volatiles organic compounds). Various designs of micro-devices have been investigated and a special focus has been dedicated to the carbon adsorbent. The optimization of the device and its operation were driven by its future application in outdoor environments. The benefits of using porous silicon to ease the fixing of the carbon absorbent in micro-channels and to modify the gas desorption kinetic are also investigated. Results on a device based on a carbon adsorbent powder filled in a porous silicon micro-channel for benzene preconcentration are reported.
Bibliography:ObjectType-Article-1
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ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2010.05.054