CUED Publications database

Thermal plasma synthesis of superparamagnetic iron oxide nanoparticles

Lei, P and Boies, AM and Calder, S and Girshick, SL (2012) Thermal plasma synthesis of superparamagnetic iron oxide nanoparticles. Plasma Chemistry and Plasma Processing, 32. pp. 519-531. ISSN 0272-4324

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Abstract

Superparamagnetic iron oxide nanoparticles were synthesized by injecting ferrocene vapor and oxygen into an argon/helium DC thermal plasma. Size distributions of particles in the reactor exhaust were measured online using an aerosol extraction probe interfaced to a scanning mobility particle sizer, and particles were collected on transmission electron microscopy (TEM) grids and glass fiber filters for off-line characterization. The morphology, chemical and phase composition of the nanoparticles were characterized using TEM and X-ray diffraction, and the magnetic properties of the particles were analyzed with a vibrating sample magnetometer and a magnetic property measurement system. Aerosol at the reactor exhaust consisted of both single nanocrystals and small agglomerates, with a modal mobility diameter of 8-9 nm. Powder synthesized with optimum oxygen flow rate consisted primarily of magnetite (Fe 3O 4), and had a room-temperature saturation magnetization of 40.15 emu/g, with a coercivity and remanence of 26 Oe and 1.5 emu/g, respectively. © Springer Science+Business Media, LLC 2011.

Item Type: Article
Uncontrolled Keywords: DC thermal plasma Iron oxide Magnetic properties Nanoparticles
Subjects: UNSPECIFIED
Divisions: Div A > Energy
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:22
Last Modified: 08 Dec 2014 02:34
DOI: 10.1007/s11090-012-9364-1