Coating of soot and (NH4)2SO4 particles by ozonolysis products of α-pinene

dc.contributor.authorSaathoff, Harald
dc.contributor.authorNaumann, Karl-Heinz
dc.contributor.authorSchnaiter, Martin
dc.contributor.authorSchöck, Werner
dc.contributor.authorMöhler, Ottmar
dc.contributor.authorSchurath, Ulrich
dc.contributor.authorWeingartner, Ernest
dc.contributor.authorGysel, Martin
dc.contributor.authorBaltensperger, Urs
dc.date.accessioned2024-08-20T07:46:01Z
dc.date.available2024-08-20T07:46:01Z
dc.date.issued2003-10
dc.description.abstractThe ozonolysis of α-pinene in a large aerosol chamber was used to generate secondary organic aerosol (SOA) mass by homogeneous nucleation, or by heterogeneous nucleation, either on soot, or on (NH4)2SO4 seed aerosols. The rate of the α-pinene + ozone reaction and the aerosol yield of ∼19% are in good agreement with literature data. The organic coating of soot particles leads to a compaction of the fractal agglomerates expressed by an increase in fractal dimension from 1.9 to 2.1 for Diesel soot, and from 2.0 to 2.3 for spark generated “Palas” soot. The dielectric coating of the soot particles with SOA layers between 2 to 11 nm gives rise to a substantial enhancement of their single scattering albedo, from about 0.2 to 0.5, and increases the effective absorption coefficients of both soot types by ca. 30%. The coating of both soot types increases the hygroscopic growth factors (HGF) to values close below the HGF measured for pure SOA material d/d0∼1:12 at 90% RH.
dc.identifier.doi10.1016/s0021-8502(03)00364-1
dc.identifier.issn0021-8502
dc.identifier.urihttps://irf.fhnw.ch/handle/11654/46807
dc.issue10
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofJournal of Aerosol Science
dc.spatialAmsterdam
dc.subject.ddc550 - Geowissenschaften
dc.titleCoating of soot and (NH4)2SO4 particles by ozonolysis products of α-pinene
dc.type01A - Beitrag in wissenschaftlicher Zeitschrift
dc.volume34
dspace.entity.typePublication
fhnw.InventedHereNo
fhnw.ReviewTypeAnonymous ex ante peer review of a complete publication
fhnw.affiliation.hochschuleHochschule für Technikde_CH
fhnw.affiliation.institutlnstitut für Sensorik und Elektronikde_CH
fhnw.openAccessCategoryClosed
fhnw.pagination1297-1321
fhnw.publicationStatePublished
relation.isAuthorOfPublication05dd9a19-7a24-4325-805a-2d121483b168
relation.isAuthorOfPublication.latestForDiscovery05dd9a19-7a24-4325-805a-2d121483b168
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