Study of the mobility, surface area, and sintering behavior of agglomerates in the transition regime by tandem differential mobility analysis
Identifieur interne : 002C24 ( Main/Exploration ); précédent : 002C23; suivant : 002C25Study of the mobility, surface area, and sintering behavior of agglomerates in the transition regime by tandem differential mobility analysis
Auteurs : Kuk Cho [États-Unis] ; Christopher J. Hogan Jr. [États-Unis] ; Pratim Biswas [États-Unis]Source :
- Journal of Nanoparticle Research [ 1388-0764 ] ; 2007-12-01.
English descriptors
Abstract
Abstract: The surface area of nanosized agglomerates is of great importance as the reactivity and health effects of such particles are highly dependent on surface area. Changes in surface area through sintering during nanoparticle synthesis processes are also of interest for precision control of synthesised particles. Unfortunately, information on particle surface area and surface area dynamics is not readily obtainable through traditional particle mobility sizing techniques. In this study, we have experimentally determined the mobility diameter of transition regime agglomerates with 3, 4, and 5 primary particles. Agglomerates were produced by spray drying well-characterised polystyrene latex particles with diameters of 55, 67, 76, and 99 nm. Tandem differential mobility analysis was used to determine agglomerate mobility diameter by selecting monodisperse agglomerates with the same number of primary particles in the first DMA, and subsequently completely sintering the agglomerates in a furnace aerosol reactor. The size distribution of the completely sintered particles was measured by an SMPS system, which allowed for the determination of the number of primary particles in the agglomerates. A simple power law regression was used to express mobility diameter as a function of primary particle size and the number of primary particles, and had an excellent correlation (R2 = 0.9971) with the experimental data. A scaling exponent was determined from the experimental data to relate measured mobility diameter to surface area for agglomerates. Using this relationship, the sintering characteristics of agglomerates were also examined for varying furnace temperatures and residence times. The sintering data agreed well with the geometric sintering model (GSM) model proposed by Cho & Biswas (2006a) as well as with the model proposed Koch & Friedlander (1990) for sintering by viscous flow.
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DOI: 10.1007/s11051-007-9243-5
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Hogan Jr.</name></author><author><name sortKey="Biswas, Pratim" sort="Biswas, Pratim" uniqKey="Biswas P" first="Pratim" last="Biswas">Pratim Biswas</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:B590C28A3E0921D1097EEF0BBD1AAA971F9E9FC2</idno><date when="2007" year="2007">2007</date><idno type="doi">10.1007/s11051-007-9243-5</idno><idno type="url">https://api.istex.fr/ark:/67375/VQC-RQZJBZK0-M/fulltext.pdf</idno><idno type="wicri:Area/Istex/Corpus">000154</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000154</idno><idno type="wicri:Area/Istex/Curation">000154</idno><idno type="wicri:Area/Istex/Checkpoint">000877</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000877</idno><idno type="wicri:doubleKey">1388-0764:2007:Cho K:study:of:the</idno><idno type="wicri:Area/Main/Merge">002C50</idno><idno type="wicri:Area/Main/Curation">002C24</idno><idno type="wicri:Area/Main/Exploration">002C24</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Study of the mobility, surface area, and sintering behavior of agglomerates in the transition regime by tandem differential mobility analysis</title><author><name sortKey="Cho, Kuk" sort="Cho, Kuk" uniqKey="Cho K" first="Kuk" last="Cho">Kuk Cho</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Energy, Environmental and Chemical Engineering, Washington University, Campus Box 1180, One Brookings Drive, 63130, St. Louis, MO</wicri:regionArea><wicri:noRegion>MO</wicri:noRegion></affiliation></author><author><name sortKey="Hogan Jr, Christopher J" sort="Hogan Jr, Christopher J" uniqKey="Hogan Jr C" first="Christopher J." last="Hogan Jr.">Christopher J. Hogan Jr.</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Energy, Environmental and Chemical Engineering, Washington University, Campus Box 1180, One Brookings Drive, 63130, St. Louis, MO</wicri:regionArea><wicri:noRegion>MO</wicri:noRegion></affiliation></author><author><name sortKey="Biswas, Pratim" sort="Biswas, Pratim" uniqKey="Biswas P" first="Pratim" last="Biswas">Pratim Biswas</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Energy, Environmental and Chemical Engineering, Washington University, Campus Box 1180, One Brookings Drive, 63130, St. Louis, MO</wicri:regionArea><wicri:noRegion>MO</wicri:noRegion></affiliation><affiliation wicri:level="1"><country wicri:rule="url">États-Unis</country></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Nanoparticle Research</title><title level="j" type="sub">An Interdisciplinary Forum for Nanoscale Science and Technology</title><title level="j" type="abbrev">J Nanopart Res</title><idno type="ISSN">1388-0764</idno><idno type="eISSN">1572-896X</idno><imprint><publisher>Springer Netherlands</publisher><pubPlace>Dordrecht</pubPlace><date type="published" when="2007-12-01">2007-12-01</date><biblScope unit="volume">9</biblScope><biblScope unit="issue">6</biblScope><biblScope unit="page" from="1003">1003</biblScope><biblScope unit="page" to="1012">1012</biblScope></imprint><idno type="ISSN">1388-0764</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1388-0764</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Agglomeration</term><term>Instrumentation</term><term>Mobility diameter</term><term>Nanoparticles</term><term>Sintering</term><term>Surface area</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abstract: The surface area of nanosized agglomerates is of great importance as the reactivity and health effects of such particles are highly dependent on surface area. Changes in surface area through sintering during nanoparticle synthesis processes are also of interest for precision control of synthesised particles. Unfortunately, information on particle surface area and surface area dynamics is not readily obtainable through traditional particle mobility sizing techniques. In this study, we have experimentally determined the mobility diameter of transition regime agglomerates with 3, 4, and 5 primary particles. Agglomerates were produced by spray drying well-characterised polystyrene latex particles with diameters of 55, 67, 76, and 99 nm. Tandem differential mobility analysis was used to determine agglomerate mobility diameter by selecting monodisperse agglomerates with the same number of primary particles in the first DMA, and subsequently completely sintering the agglomerates in a furnace aerosol reactor. The size distribution of the completely sintered particles was measured by an SMPS system, which allowed for the determination of the number of primary particles in the agglomerates. A simple power law regression was used to express mobility diameter as a function of primary particle size and the number of primary particles, and had an excellent correlation (R2 = 0.9971) with the experimental data. A scaling exponent was determined from the experimental data to relate measured mobility diameter to surface area for agglomerates. Using this relationship, the sintering characteristics of agglomerates were also examined for varying furnace temperatures and residence times. The sintering data agreed well with the geometric sintering model (GSM) model proposed by Cho & Biswas (2006a) as well as with the model proposed Koch & Friedlander (1990) for sintering by viscous flow.</div></front></TEI><affiliations><list><country><li>États-Unis</li></country></list><tree><country name="États-Unis"><noRegion><name sortKey="Cho, Kuk" sort="Cho, Kuk" uniqKey="Cho K" first="Kuk" last="Cho">Kuk Cho</name></noRegion><name sortKey="Biswas, Pratim" sort="Biswas, Pratim" uniqKey="Biswas P" first="Pratim" last="Biswas">Pratim Biswas</name><name sortKey="Biswas, Pratim" sort="Biswas, Pratim" uniqKey="Biswas P" first="Pratim" last="Biswas">Pratim Biswas</name><name sortKey="Hogan Jr, Christopher J" sort="Hogan Jr, Christopher J" uniqKey="Hogan Jr C" first="Christopher J." last="Hogan Jr.">Christopher J. Hogan Jr.</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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