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Deposition of Magnetic Nanoparticles Suspended in the Gas Phase on a Specific Target Area

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journal contribution
posted on 01.11.2006 by Myoseon Jang, Gang Cao
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.