A Cost-Effective Method of Aerosolizing Dry Powdered Nanoparticles

TitleA Cost-Effective Method of Aerosolizing Dry Powdered Nanoparticles
Publication TypeJournal Article
Year of Publication2013
AuthorsTiwari AJ, Fields CG, Marr LC
JournalAerosol Science and Technology
Volume47
Issue11
Pagination1267 - 1275
Date Published11/2013
ISSN1521-7388
Abstract

The ability to produce nanoscale aerosols from dry powdered material is needed for studies of the toxicity and environmental transformation and fate of manufactured nanoparticles. Wet aerosol generation methods can alter particle chemistry, while dry methods often cannot produce truly nanoscale aerosols. We have developed a cost-effective dry dispersion technique for manufactured nanoparticles and have demonstrated its use with C60 fullerene, TiO2, and CeO2. The system disperses dry powders to create aerosols with mode diameters below 100 nm. Average mode and median diameters for each of the tested manufactured nanoparticles are 91 and 107 nm for C60, 65 and 77 nm for TiO2, and 40 and 43 nm for CeO2. All aerosols exhibit right-skewed unimodal distributions and irregular morphology. Aerosol mass concentrations produced by the dispersion system vary linearly with the mass of nanomaterial loaded into it and are of a magnitude appropriate for inhalation nanotoxicology studies. This work demonstrates the ability of a simple device to produce nanoscale aerosols from powdered engineered nanoparticles.

DOI10.1080/02786826.2013.834292
Short TitleAerosol Science and Technology