Brownian diffusion effect on nanometer aerosol classification in electrical mobility spectrometer

A multi-channel differential mobility analyzer (MCDMA) or aerosol spectrometer is widely used for classifying and measuring nanometer aerosol particles in the size range from 1 nm to 1 μm because of its better time response than a typical differential mobility analyzer. In the present study, the eff...

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Main Authors: Panich Intra, Nakorn Tippayawong
Format: Journal
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/59450
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-594502018-09-10T03:16:07Z Brownian diffusion effect on nanometer aerosol classification in electrical mobility spectrometer Panich Intra Nakorn Tippayawong Chemical Engineering Chemistry A multi-channel differential mobility analyzer (MCDMA) or aerosol spectrometer is widely used for classifying and measuring nanometer aerosol particles in the size range from 1 nm to 1 μm because of its better time response than a typical differential mobility analyzer. In the present study, the effect of Brownian diffusion on electrical mobility classification and trajectory of nanometer aerosol particles in an electrical mobility spectrometer developed at Chiang Mai University has been analytically investigated. Th Brownian diffusion of particles inside the spectrometer increased with decreasing particle size and flow rates of aerosol and clean sheath air, and with increasing inner electrode voltage, and also decreased with decreasing operating pressure. The particle trajectories considering Brownian diffusion motion inside the spectrometer were found to be broader than those under no Brownian diffusion. Smaller particles were found to have higher degree of broadening of trajectory than the larger particles. Brownian diffusion effect was found to be significant for particles smaller than 10 nm. © 2009 Springer. 2018-09-10T03:15:20Z 2018-09-10T03:15:20Z 2009-01-01 Journal 02561115 2-s2.0-59349109451 10.1007/s11814-009-0046-5 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=59349109451&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/59450
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Chemical Engineering
Chemistry
spellingShingle Chemical Engineering
Chemistry
Panich Intra
Nakorn Tippayawong
Brownian diffusion effect on nanometer aerosol classification in electrical mobility spectrometer
description A multi-channel differential mobility analyzer (MCDMA) or aerosol spectrometer is widely used for classifying and measuring nanometer aerosol particles in the size range from 1 nm to 1 μm because of its better time response than a typical differential mobility analyzer. In the present study, the effect of Brownian diffusion on electrical mobility classification and trajectory of nanometer aerosol particles in an electrical mobility spectrometer developed at Chiang Mai University has been analytically investigated. Th Brownian diffusion of particles inside the spectrometer increased with decreasing particle size and flow rates of aerosol and clean sheath air, and with increasing inner electrode voltage, and also decreased with decreasing operating pressure. The particle trajectories considering Brownian diffusion motion inside the spectrometer were found to be broader than those under no Brownian diffusion. Smaller particles were found to have higher degree of broadening of trajectory than the larger particles. Brownian diffusion effect was found to be significant for particles smaller than 10 nm. © 2009 Springer.
format Journal
author Panich Intra
Nakorn Tippayawong
author_facet Panich Intra
Nakorn Tippayawong
author_sort Panich Intra
title Brownian diffusion effect on nanometer aerosol classification in electrical mobility spectrometer
title_short Brownian diffusion effect on nanometer aerosol classification in electrical mobility spectrometer
title_full Brownian diffusion effect on nanometer aerosol classification in electrical mobility spectrometer
title_fullStr Brownian diffusion effect on nanometer aerosol classification in electrical mobility spectrometer
title_full_unstemmed Brownian diffusion effect on nanometer aerosol classification in electrical mobility spectrometer
title_sort brownian diffusion effect on nanometer aerosol classification in electrical mobility spectrometer
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=59349109451&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/59450
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