Articles | Volume 21, issue 3
Measurement report
10 Feb 2021
Measurement report |  | 10 Feb 2021

Measurement report: Sulfuric acid nucleation and experimental conditions in a photolytic flow reactor

David R. Hanson, Seakh Menheer, Michael Wentzel, and Joan Kunz

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H2SO4 and particle production in a photolytic flow reactor: chemical modeling, cluster thermodynamics and contamination issues
David R. Hanson, Hussein Abdullahi, Seakh Menheer, Joaquin Vences, Michael R. Alves, and Joan Kunz
Atmos. Chem. Phys., 19, 8999–9015,,, 2019
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Vertically resolved concentration and liquid water content of atmospheric nanoparticles at the US DOE Southern Great Plains site
Haihan Chen, Anna L. Hodshire, John Ortega, James Greenberg, Peter H. McMurry, Annmarie G. Carlton, Jeffrey R. Pierce, Dave R. Hanson, and James N. Smith
Atmos. Chem. Phys., 18, 311–326,,, 2018
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Chemical ionization of clusters formed from sulfuric acid and dimethylamine or diamines
Coty N. Jen, Jun Zhao, Peter H. McMurry, and David R. Hanson
Atmos. Chem. Phys., 16, 12513–12529,,, 2016
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Multiple new-particle growth pathways observed at the US DOE Southern Great Plains field site
Anna L. Hodshire, Michael J. Lawler, Jun Zhao, John Ortega, Coty Jen, Taina Yli-Juuti, Jared F. Brewer, Jack K. Kodros, Kelley C. Barsanti, Dave R. Hanson, Peter H. McMurry, James N. Smith, and Jeffery R. Pierce
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Amine permeation sources characterized with acid neutralization and sensitivities of an amine mass spectrometer
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Related subject area

Subject: Aerosols | Research Activity: Laboratory Studies | Altitude Range: Troposphere | Science Focus: Chemistry (chemical composition and reactions)
Technical note: Chemical composition and source identification of fluorescent components in atmospheric water-soluble brown carbon by excitation–emission matrix spectroscopy with parallel factor analysis – potential limitations and applications
Tao Cao, Meiju Li, Cuncun Xu, Jianzhong Song, Xingjun Fan, Jun Li, Wanglu Jia, and Ping'an Peng
Atmos. Chem. Phys., 23, 2613–2625,,, 2023
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Insoluble lipid film mediates transfer of soluble saccharides from the sea to the atmosphere: the role of hydrogen bonding
Minglan Xu, Narcisse Tsona Tchinda, Jianlong Li, and Lin Du
Atmos. Chem. Phys., 23, 2235–2249,,, 2023
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Magnetic fraction of the atmospheric dust in Kraków – physicochemical characteristics and possible environmental impact
Jan M. Michalik, Wanda Wilczyńska-Michalik, Łukasz Gondek, Waldemar Tokarz, Jan Żukrowski, Marta Gajewska, and Marek Michalik
Atmos. Chem. Phys., 23, 1449–1464,,, 2023
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Modeling daytime and nighttime secondary organic aerosol formation via multiphase reactions of biogenic hydrocarbons
Sanghee Han and Myoseon Jang
Atmos. Chem. Phys., 23, 1209–1226,,, 2023
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SO2 enhances aerosol formation from anthropogenic volatile organic compound ozonolysis by producing sulfur-containing compounds
Zhaomin Yang, Kun Li, Narcisse T. Tsona, Xin Luo, and Lin Du
Atmos. Chem. Phys., 23, 417–430,,, 2023
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Cited articles

Ball, S. M., Hanson, D. R., Eisele, F. L., and McMurry, P. H.: Laboratory Studies of Particle Nucleation – Initial Results for H2SO4, H2O, and NH3 Vapors, J. Geophys. Res., 104, 23709–23718, 1999. 
Benson, D. R., Yu, J. H., Markovich, A., and Lee, S.-H.: Ternary homogeneous nucleation of H2SO4, NH3, and H2O under conditions relevant to the lower troposphere, Atmos. Chem. Phys., 11, 4755–4766,, 2011. 
Berndt, T., Stratmann, F., Sipilä, M., Vanhanen, J., Petäjä, T., Mikkilä, J., Grüner, A., Spindler, G., Lee Mauldin III, R., Curtius, J., Kulmala, M., and Heintzenberg, J.: Laboratory study on new particle formation from the reaction OH + SO2: influence of experimental conditions, H2O vapour, NH3 and the amine tert-butylamine on the overall process, Atmos. Chem. Phys., 10, 7101–7116,, 2010. 
Coffman, D. J. and Hegg, D. A.: A Preliminary Study of the Effect of Ammonia on Particle Nucleation in the Marine Boundary Layer, J. Geophys. Res.-Atmos., 100, 7147–7160,, 1995. 
Short summary
We report experimental measurements of particle formation in a flow reactor that extend the results from this experiment to a total of more than 270 runs over a time period of ~3 years. This has allowed us to detect a general increase in the cleanliness of the system and improve our knowledge of its chemistry. In-house simulations allowed us to construct phenomenological free energies of molecular clusters of sulfuric acid and ammonia that are appropriate for application to the atmosphere.
Final-revised paper