Mechanisms of Sulfur and Nitrogen Incorporation into Newly Formed Particles

Bryan R. Bzdek and Murray V. Johnston

Insight into the mechanisms by which sulfur and nitrogen incorporate into nanoparticles during atmospheric new particle formation (NPF) is gained through an assessment of field and laboratory measurements. For both ~1 nm clusters studied in laboratory experiments and 20 nm ambient nanoparticles, sulfuric acid contributes to growth via a barrierless addition process.  In contrast, the addition of cation forming nitrogen (i.e. ammonia) may require traversing an activation barrier, which can decrease the rate of addition and influence particle acidity.

Join today to view and download the full abstract/presentation