Monodisperse sodium oleate coated magnetite high susceptibility nanoparticles for hyperthermia applications

Monodisperse sodium oleate coated magnetite high susceptibility nanoparticles for hyperthermia applications

We report a simple and low cost methodology to synthesize sodium oleate coated magnetite nanoparticles for hyperthermia applications. The system consists of oleate coated magnetite nanoparticles with large susceptibility (1065emu/gT), induced by the dipolar inter-particle interaction, with a magneti...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials Vol. 364; pp. 72 - 79
Main Authors: Araújo-Neto, R.P., Silva-Freitas, E.L., Carvalho, J.F., Pontes, T.R.F., Silva, K.L., Damasceno, I.H.M., Egito, E.S.T., Dantas, Ana L., Morales, Marco A., Carriço, Artur S.
Format: Journal Article
Language:English
Published: Amsterdam Elsevier B.V 01-09-2014
Elsevier
Subjects:
Agglomeration
Coating
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Density
Diamagnetism, paramagnetism and superparamagnetism
Exact sciences and technology
Hyperthermia
Magnetic permeability
Magnetic properties and materials
Magnetite
Nanoparticle
Nanoparticles
Physics
Sodium
Sodium oleate
Superparamagnetic
Sodium oleate
Superparamagnetic
Magnetite
Nanoparticle
Hyperthermia
Particle size
Iron oxide
Particle cluster
Hydrodynamics
Superparamagnetism
Low field
Dipole interactions
Nanoparticles
Transmission electron microscopy
Particle interactions
Coated particle
Fourier-transformed infrared spectrometry
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Summary:We report a simple and low cost methodology to synthesize sodium oleate coated magnetite nanoparticles for hyperthermia applications. The system consists of oleate coated magnetite nanoparticles with large susceptibility (1065emu/gT), induced by the dipolar inter-particle interaction, with a magnetic core diameter in the 6nm–12nm size range. In aqueous medium, the nanoparticles agglomerate to form a monodisperse system, exhibiting a mean hydrodynamic diameter of 60.6nm±4.1nm, with a low average polydispersity index of 0.128±0.003, as required for intravenous applications. The system exhibits promising efficiency for magnetic hyperthermia, with a specific absorption rate of 14 W/g at a low field amplitude of 15.9kA/m and frequency of 62kHz. In a 50mg/mL density in 1mL, the temperature rises to 42.5°C in 1.9min. •Facile method to synthesize high susceptibility superparamagnetic magnetite nanoparticles.•Synthesis of monodisperse oleate coated magnetite nanoparticles.•Rapid temperature increase after exposure to low intensity alternating magnetic field.•Promising magnetic system to be employed in magnetic hyperthermia.
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ISSN:0304-8853
DOI:10.1016/j.jmmm.2014.04.001