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Synthesis and Dispersion of Magnetic Nano-Particles by a Surfactant-Mediated Approach

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Abstract:

Magnetic nano-particles of around 20nm synthesized by poly-ethylene glycol (PEG) and sodium oleate mediated approach show well stability without sediment during 6 months. Upon treated through the modification procedure, magnetic nano-particles have a weakly physical bond with PEG, meanwhile a strong bond with sodium oleate. Naked magnetic nano-particles present positive charges on the surface, while turn to be negative when modified with sodium oleate, which suggest that the hydrophilic carboxyl on the surface of the nano-particles is outward. Magnetic property of the nano-particles changes according to the concentrations of reactants and surfactant.

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Periodical:

Key Engineering Materials (Volumes 330-332)

Pages:

231-234

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.330-332.231

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Online since:

February 2007

Authors:

P. Hou, J. Sun, S.B. Zhou, Jie Weng

Keywords:

Magnetic Nanoparticle, Polyethylene Glycol (PEG), Sodium Oleate, Superparamagnetism

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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