Inderscience Publishers

Preparation of monodisperse functionalised superparamagnetic nanoparticles

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Monocrystalline iron oxide nanoparticles were synthesised by a one-pot procedure using iron salts in benzyl alcohol and functionalised with dopamine and carboxylmethylated dextran. Dextran macromolecules with low and high carboxyl contents were synthesised and grafted onto the dopamine-functionalised nanoparticles. The particles were characterised using X-ray photoelectron spectroscopy (XPS), infrared spectroscopy (IR), transmission electron microscopy (TEM) and dynamic light scattering (DLS). Monodisperse functionalised nanoparticles were obtained with a hydrodynamic diameter of 20?50 nm. The functionalisation also provided excellent colloidal stability in phosphate buffered saline, even at high salt concentration.

Keywords: magnetite, superparamagnetic nanoparticles, synthesis, functionalisation, iron oxide nanoparticles, nanotechnology, monodisperse functionalised nanoparticles, colloidal stability, phosphate buffered saline, high salt concentration

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