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Effect of Condensed-Phase Photochemical Reactions on Viscosity and Volatility of Organic Aerosols

EMSL Project ID


Recent advances in understanding aerosol chemistry strongly suggest that: (1) photochemical processes occurring inside aerosol particles represent an important mechanism of aging for organic aerosols; (2) the high viscosity of certain types of aerosol particles can affect various processes involving aerosols, including aging processes. This proposal will tie these two important effects together. The main goal of this proposal is to investigate the effect of condensed-phase photochemical processes on the viscosity and volatility of secondary organic aerosols (SOA), using a combination of state-of-the art laboratory experiments and modeling. To achieve this goal, we will study the effect of solar irradiation on the molecular level composition of biogenic and anthropogenic SOA prepared under various environmental conditions, characterize the viscosity of these SOA particles, before and after exposure to solar radiation, using state-of-the-art viscometry approaches, and model the distribution of volatilities of SOA constituents in the aerosol particles, before and after exposure to solar radiation, using the novel "molecular corridors" parameterization. This information will be immediately useful for a quantitative description of the gas-particle partitioning in aerosols, a key component of any atmospheric model that deals with aerosols. This proposal will take full advantage of the unique capabilities in high-resolution aerosol mass spectrometry analysis and particle imaging developed in EMSL, and leverage it with a combination of methods developed in the participating user laboratories.

Project Details

Project type
Large-Scale EMSL Research
Start Date
End Date


Principal Investigator

Manabu Shiraiwa
University of California, Irvine


Sergey Nizkorodov
University of California, Irvine

Team Members

Kevin Jankowski
Purdue University

Jay Tomlin
Purdue University

Lauren Fleming
University of California, Irvine

Mary Gilles
Lawrence Berkeley National Laboratory

Allan Bertram
University of British Columbia

Alexander Laskin
Purdue University

Related Publications

Aiona PK, HJ Lee, P Lin, FD Heller, A Laskin, J Laskin, and SA Nizkorodov. 2017. "A Role for 2-Methyl Pyrrole in the Browning of 4-Oxopentanal and Limonene Secondary Organic Aerosol." Environmental Science & Technology 51(19):11048–11056. doi:10.1021/acs.est.7b02293
Bhaskar Bhaduri, Raanan Carmieli, Alexander Laskin, Avi Lavi, Peng Lin, Yinon Rudich. 2017. "Characterization of Light-Absorbing Oligomers from Reactions of Phenolic Compounds and Fe(III)." ACS Earth and Space Chemistry 1 (10):637-646.
Hinks M.L., J. Montoya, L. Ellison, P. Lin, A. Laskin, J. Laskin, and M. Shiraiwa, et al. 2018. "Effect of Relative Humidity on the Yield and Composition of Secondary Organic Aerosol from Oxidation of Toluene." Atmospheric Chemistry and Physics 18. PNNL-SA-124399. doi:10.5194/acp-18-1643-2018
Lin P., N. Bluvshtein, Y. Rudich, S. Nizkorodov, J. Laskin, and A. Laskin. 2017. "Molecular Chemistry of Atmospheric Brown Carbon Inferred from a Nationwide Biomass Burning Event." Environmental Science & Technology 51, no. 20:11561-11570. PNNL-SA-126028. doi:10.1021/acs.est.7b02276
Narendra K. Arora, Donald R. Blake, Rufus D. Edwards, Lauren T. Fleming, Alexander Laskin, Julia Laskin, Peng Lin, Simone Meinardi, Sergey A. Nizkorodov, Ajay Pillarisetti, Kirk R. Smith, Robert Weltman, Ankit Yadav. 2018. "Molecular composition of particulate matter emissions from dung and brushwood burning household cookstoves in Haryana, India." Atmospheric Chemistry and Physics 18 (4):2461-2480.
Romonosky DE, Y Li, M Shiraiwa, A Laskin, J Laskin, and S Nizkorodov. 2017. "Aqueous Photochemistry of Secondary Organic Aerosol of ?-Pinene and ?-Humulene Oxidized with Ozone, Hydroxyl Radical, and Nitrate Radical." Journal of Physical Chemistry A 121(6):1298-1309. doi:10.1021/acs.jpca.6b10900