Mechanisms of soot-aggregate restructuring and compaction.
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| Title: | Mechanisms of soot-aggregate restructuring and compaction. |
|---|---|
| Authors: | Corbin, Joel C.1 (AUTHOR), Modini, Robin L.1 (AUTHOR), Gysel-Beer, Martin1 (AUTHOR) |
| Source: | Aerosol Science & Technology. Feb2023, Vol. 57 Issue 2, p89-111. 23p. |
| Subjects: | Compacting, Anthracene, Soot, Heterogenous nucleation |
| Abstract: | Soot aggregates form as open, fractal-like structures, but aged atmospheric particles are often observed to be restructured into more-compact shapes due to internal mixing ("coating"). This compaction has a major effect on the radiative properties of the aggregates, and may also influence their aerosol-cloud interactions, toxicity, and deposition in human lungs. Recent laboratory studies have presented conflicting arguments on whether this compaction occurs during condensation or during the evaporation of coatings. In this three-part study, we combine theory and experiments to explain these conflicting results. First, we review the surface-science literature and identify explicit mechanisms for condensation-compaction as well as evaporation-compaction. We also identify a mechanism for avoiding compaction during condensation, based on heterogeneous nucleation theory and the kinetic barriers to capillary formation. Second, we review the soot-restructuring literature and find clear evidence for both condensation- and evaporation-compaction, with condensation-compaction being the norm. Third, we present new experimental results where the capillary forces due to anthracene coatings were "switched on" or "switched off" by using solid or liquid phases during coating addition and removal. Consequently, we demonstrate condensation-compaction, evaporation-compaction, and no compaction, for the same soot source. Overall, our study indicates that soot particles will typically undergo compaction when internal mixing occurs by the condensation of liquid coatings, while compaction may be avoided when internal mixing occurs through coagulation or the gas-to-particle formation of solid or highly viscous coatings. Copyright © 2022 American Association for Aerosol Research [ABSTRACT FROM AUTHOR] |
| Copyright of Aerosol Science & Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 161179267 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Mechanisms of soot-aggregate restructuring and compaction. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Corbin%2C+Joel+C%2E%22">Corbin, Joel C.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Modini%2C+Robin+L%2E%22">Modini, Robin L.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gysel-Beer%2C+Martin%22">Gysel-Beer, Martin</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Aerosol+Science+%26+Technology%22">Aerosol Science & Technology</searchLink>. Feb2023, Vol. 57 Issue 2, p89-111. 23p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Compacting%22">Compacting</searchLink><br /><searchLink fieldCode="DE" term="%22Anthracene%22">Anthracene</searchLink><br /><searchLink fieldCode="DE" term="%22Soot%22">Soot</searchLink><br /><searchLink fieldCode="DE" term="%22Heterogenous+nucleation%22">Heterogenous nucleation</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Soot aggregates form as open, fractal-like structures, but aged atmospheric particles are often observed to be restructured into more-compact shapes due to internal mixing ("coating"). This compaction has a major effect on the radiative properties of the aggregates, and may also influence their aerosol-cloud interactions, toxicity, and deposition in human lungs. Recent laboratory studies have presented conflicting arguments on whether this compaction occurs during condensation or during the evaporation of coatings. In this three-part study, we combine theory and experiments to explain these conflicting results. First, we review the surface-science literature and identify explicit mechanisms for condensation-compaction as well as evaporation-compaction. We also identify a mechanism for avoiding compaction during condensation, based on heterogeneous nucleation theory and the kinetic barriers to capillary formation. Second, we review the soot-restructuring literature and find clear evidence for both condensation- and evaporation-compaction, with condensation-compaction being the norm. Third, we present new experimental results where the capillary forces due to anthracene coatings were "switched on" or "switched off" by using solid or liquid phases during coating addition and removal. Consequently, we demonstrate condensation-compaction, evaporation-compaction, and no compaction, for the same soot source. Overall, our study indicates that soot particles will typically undergo compaction when internal mixing occurs by the condensation of liquid coatings, while compaction may be avoided when internal mixing occurs through coagulation or the gas-to-particle formation of solid or highly viscous coatings. Copyright © 2022 American Association for Aerosol Research [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Aerosol Science & Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=161179267 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1080/02786826.2022.2137385 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 23 StartPage: 89 Subjects: – SubjectFull: Compacting Type: general – SubjectFull: Anthracene Type: general – SubjectFull: Soot Type: general – SubjectFull: Heterogenous nucleation Type: general Titles: – TitleFull: Mechanisms of soot-aggregate restructuring and compaction. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Corbin, Joel C. – PersonEntity: Name: NameFull: Modini, Robin L. – PersonEntity: Name: NameFull: Gysel-Beer, Martin IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 02 Text: Feb2023 Type: published Y: 2023 Identifiers: – Type: issn-print Value: 02786826 Numbering: – Type: volume Value: 57 – Type: issue Value: 2 Titles: – TitleFull: Aerosol Science & Technology Type: main |
| ResultId | 1 |
