Silicon is a Frequent Component of Atmospheric Nanoparticles

Bryan R. Bzdek, Andrew J. Horan, M. Ross Pennington, and Murray V. Johnston

Elemental composition measurements of individual 20 nm diameter nanoparticles analyzed in a number of different locations show that silicon (Si) is a frequent component of atmospheric nanoparticles. Nanoparticulate Si is most abundant in locations heavily impacted by anthropogenic activities. Wind direction correlations suggest the sources of Si are diffuse, and diurnal trends suggest nanoparticulate Si may result from photochemical processing of gas phase Si-containing compounds, such as cyclic siloxanes. More generally, these observations indicate a previously overlooked source of nanoaerosol mass that requires further investigation.

Join today to view and download the full abstract/presentation