| Title: | Fatty Acid Surfactant Photochemistry Results in New Particle Formation |
| Author(s): | Alpert PA; Ciuraru R; Rossignol S; Passananti M; Tinel L; Perrier S; Dupart Y; Steimer SS; Ammann M; Donaldson DJ; George C; |
| Address: | "Univ. Lyon, Universite Claude Bernard Lyon 1, CNRS, UMR 5256, IRCELYON, Institut de recherches sur la catalyse et l'environnement de Lyon, 2 avenue Albert Einstein, F-69626, Villeurbanne, France. peter.alpert@psi.ch. Paul Scherrer Institute, Laboratory of Environmental Chemistry, 5232, Villigen, PSI, Switzerland. peter.alpert@psi.ch. Univ. Lyon, Universite Claude Bernard Lyon 1, CNRS, UMR 5256, IRCELYON, Institut de recherches sur la catalyse et l'environnement de Lyon, 2 avenue Albert Einstein, F-69626, Villeurbanne, France. UMR ECOSYS, INRA, AgroParisTech, Universite Paris-Saclay, 78850, Thiverval- Grignon, France. Aix Marseille Universite, CNRS, LCE UMR 7376, 13331, Marseille, France. Department of Physics, University of Helsinki, 00014, Helsinki, Finland. Wolfson Atmospheric Chemistry Laboratory, Department of Chemistry, University of York, York, YO10 5DD, UK. Paul Scherrer Institute, Laboratory of Environmental Chemistry, 5232, Villigen, PSI, Switzerland. Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, United Kingdom. Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario, M5S 3H6, Canada. Univ. Lyon, Universite Claude Bernard Lyon 1, CNRS, UMR 5256, IRCELYON, Institut de recherches sur la catalyse et l'environnement de Lyon, 2 avenue Albert Einstein, F-69626, Villeurbanne, France. christian.george@ircelyon.univ-lyon1.fr" |
| DOI: | 10.1038/s41598-017-12601-2 |
| ISSN/ISBN: | 2045-2322 (Electronic) 2045-2322 (Linking) |
| Abstract: | "Organic interfaces that exist at the sea surface microlayer or as surfactant coatings on cloud droplets are highly concentrated and chemically distinct from the underlying bulk or overlying gas phase. Therefore, they may be potentially unique locations for chemical or photochemical reactions. Recently, photochemical production of volatile organic compounds (VOCs) was reported at a nonanoic acid interface however, subsequent secondary organic aerosol (SOA) particle production was incapable of being observed. We investigated SOA particle formation due to photochemical reactions occurring at an air-water interface in presence of model saturated long chain fatty acid and alcohol surfactants, nonanoic acid and nonanol, respectively. Ozonolysis of the gas phase photochemical products in the dark or under continued UV irradiation both resulted in nucleation and growth of SOA particles. Irradiation of nonanol did not yield detectable VOC or SOA production. Organic carbon functionalities of the SOA were probed using X-ray microspectroscopy and compared with other laboratory generated and field collected particles. Carbon-carbon double bonds were identified in the condensed phase which survived ozonolysis during new particle formation and growth. The implications of photochemical processes occurring at organic coated surfaces are discussed in the context of marine SOA particle atmospheric fluxes" |
| Notes: | "PubMed-not-MEDLINEAlpert, Peter A Ciuraru, Raluca Rossignol, Stephanie Passananti, Monica Tinel, Liselotte Perrier, Sebastien Dupart, Yoan Steimer, Sarah S Ammann, Markus Donaldson, D James George, Christian eng Research Support, Non-U.S. Gov't England 2017/10/06 Sci Rep. 2017 Oct 4; 7(1):12693. doi: 10.1038/s41598-017-12601-2" |
