title: Deposition of magnetic nanoparticles suspended in the gas phase on a specific target area.
abstract: Magnetic nanoparticles (MNPs) suspended in the air were delivered onto a specific area under a magnetic field. The targeting efficiency and the collected mass of MNPs were studied for various physical parameters such as MNP concentrations, the MNP size, sampling flow, and the strength of magnetic field. A model to predict the delivery of MNPs onto a specific target area was developed for both stagnant air and horizontal air streams and demonstrated for experimental observations. Overall, the theoretically predicted targeting mass of MNPs reasonably agreed with experimental observations. The potential use of the resulting targeting method using the MNPs suspended in the air has been also explored for the delivery of secondary organic aerosols (SOAs) to a specific area. SOAs are created from ozonolysis of terpenes coated on preexisting MNPs and targeted using the device under horizontal air streams.
authors.affiliation: Department of Environmental Sciences and Engineering, CB# 7431, Rosenau Hall, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA. mjang@email.unc.edu
authors.forename: Myoseon
authors.initials: M
authors.lastname: Jang
authors.forename: Gang
authors.initials: G
authors.lastname: Cao
mesh_terms: D000336:Aerosols; D000393:Air Pollutants; D016880:Anisotropy; D004784:Environmental Monitoring; D008280:Magnetics; D015233:Models, Statistical; D053758:Nanoparticles; D009930:Organic Chemicals; D010126:Ozone; D011138:Polytetrafluoroethylene; D013729:Terpenes / Q000032:analysis; D013997:Time Factors
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D009930:Organic Chemicals; D013729:Terpenes; D010126:Ozone; D011138:Polytetrafluoroethylene