title: Size-dependant heating rates of iron oxide nanoparticles for magnetic fluid hyperthermia.
abstract: Using the thermal decomposition of organometallics method we have synthesized high-quality, iron oxide nanoparticles of tailorable size up to ~15nm and transferred them to a water phase by coating with a biocompatible polymer. The magnetic behavior of these particles was measured and fit to a log-normal distribution using the Chantrell method and their polydispersity was confirmed to be very narrow. By performing calorimetry measurements with these monodisperse particles we have unambiguously demonstrated, for the first time, that at a given frequency, heating rates of superparamagnetic particles are dependent on particle size, in agreement with earlier theoretical predictions.
authors.affiliation: Department of Material Science, University of Washington, 323 Roberts Hall, Box 352120, Seattle, WA 98195-2120, USA.
authors.forename: Marcela
authors.initials: M
authors.lastname: Gonzales-Weimuller
authors.affiliation: Institute for Physical Higher Technology, Jena, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Zeisberger
authors.affiliation: Department of Material Science, University of Washington, 323 Roberts Hall, Box 352120, Seattle, WA 98195-2120, USA.
authors.forename: Kannan M
authors.initials: KM
authors.lastname: Krishnan
keywords: Magnetic fluid hyperthermia; Magnetic relaxation; Nanoparticle; Superparmagnetism