@inproceedings{25961,
  author = {Modi Chen and Mari Titcombe and Jingkun Jiang and Coty Jen and Chongai Kuang and Marc L Fischer and Fred L Eisele and J. J Ilja Siepmann and David R Hanson and Jun Zhao and Peter H McMurry},
  title = {Acid–base chemical reaction model for nucleation rates in the polluted atmospheric boundary layer},
  abstract = {<p>Measurements of aerosol number distributions down to one molecule have provided information that we’ve used to develop a new approach for modeling atmospheric nucleation rates. Measurements were carried out with the Cluster Chemical Ionization Mass Spectrometer (Cluster CIMS), the scanning mobility spectrometer using a diethylene glycol condensation particle counter as detector (DEG SMPS), and an ambient pressure proton transfer mass spectrometer for ammonia and amines (AmPMS). The model explains nucleation as a result of cluster evolution due to a sequence of acid-base reactions. We conclude that the smallest stable cluster contains four sulfuric acid molecules. The model leads to a simple analytic expression for nucleation rates that is reasonably consistent (i.e., ± 10x) with atmospheric observations. The model predicts that nucleation rates are equal to a prefactor, P&lt;1, times the sulfuric acid vapor collision rate, (i.e., J=P⋅0.5⋅k<sub>11</sub> ∗[H<sub>2</sub>SO<sub>4</sub>]<sup>2</sup>).</p>},
  year = {2013},
  journal = {Nucleation and Atmospheric Aerosols: 19th International Conference},
  month = {04/2013},
  publisher = {AIP Publishing LLC},
  address = {Fort Collins, CO},
  doi = {10.1063/1.4803354},
}