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dc.contributor.author
Parmentier, Evelyne A.
dc.contributor.author
David, Grégory
dc.contributor.author
Corral Arroyo, Pablo
dc.contributor.author
Bibawi, Simone
dc.contributor.author
Esat, Kıvanç
dc.contributor.author
Signorell, Ruth
dc.date.accessioned
2020-10-26T14:58:58Z
dc.date.available
2020-09-27T02:48:47Z
dc.date.available
2020-09-28T11:03:43Z
dc.date.available
2020-10-26T10:51:00Z
dc.date.available
2020-10-26T11:16:16Z
dc.date.available
2020-10-26T14:58:58Z
dc.date.issued
2021-01
dc.identifier.issn
0021-8502
dc.identifier.issn
1879-1964
dc.identifier.other
10.1016/j.jaerosci.2020.105660
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/442904
dc.identifier.doi
10.3929/ethz-b-000442904
dc.description.abstract
We report the photodegradation of optically trapped oleic acid droplets by visible light in the absence of additional reactive gaseous species. The temporal evolution of the droplet's chemical composition and size is monitored by Raman spectroscopy and elastic light scattering, respectively. The dependencies on the oxygen amount in the surrounding gas phase (~0–20%), the droplet size (~500–3000 nm in radius), and the laser power and wavelength are investigated. The oxygen amount and the droplet size have only a very minor influence on the reaction rate, if at all. By contrast, the reaction becomes substantially faster at higher laser power and shorter wavelength. The experimental observations indicate that mechanisms involving the photoexcitation of oleic acid are the dominant pathways. Our study reveals that direct photodegradation has to be accounted for when using optical traps or applying spectroscopic and light scattering characterization methods to study aerosol particles that contain fatty acids. © 2020 Elsevier Ltd
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Elsevier
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Fatty acid
en_US
dc.subject
Oleic acid
en_US
dc.subject
Photochemistry
en_US
dc.subject
Optical trapping
en_US
dc.subject
Temporal Raman scattering
en_US
dc.subject
Reaction kinetics
en_US
dc.title
Photochemistry of single optically trapped oleic acid droplets
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2020-09-15
ethz.journal.title
Journal of Aerosol Science
ethz.journal.volume
151
en_US
ethz.journal.abbreviated
J. Aerosol Sci.
ethz.pages.start
105660
en_US
ethz.size
11 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
Phase Transitions of Ultrafine Aerosol Particles: Condensation, Freezing, and Metal Formation in Confined Systems
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Amsterdam
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02020 - Dep. Chemie und Angewandte Biowiss. / Dep. of Chemistry and Applied Biosc.::02515 - Laboratorium für Physikalische Chemie / Laboratory of Physical Chemistry::03961 - Signorell, Ruth / Signorell, Ruth
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02020 - Dep. Chemie und Angewandte Biowiss. / Dep. of Chemistry and Applied Biosc.::02515 - Laboratorium für Physikalische Chemie / Laboratory of Physical Chemistry::03961 - Signorell, Ruth / Signorell, Ruth
ethz.grant.agreementno
172472
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
Projektförderung in Mathematik, Natur- und Ingenieurwissenschaften (Abteilung II)
ethz.relation.isReferencedBy
handle/20.500.11850/495184
ethz.date.deposited
2020-09-27T02:49:00Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2020-09-28T11:03:57Z
ethz.rosetta.lastUpdated
2021-02-15T19:20:35Z
ethz.rosetta.versionExported
true
ethz.COinS
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