Abstract
Monodisperse iron oxide nanoparticles could be successfully synthesized with two kinds of precipitants through a precipitation method. As-prepared nanoparticles in the size around 10 nm with regular spherical-like shape were achieved by adjusting pH values. NaOH and NH3·H2O were used as two precipitants for comparison. The average size of nanoparticles with NH3·H2O precipitant got smaller and represented better dispersibility, while nanoparticles with NaOH precipitant represented better magnetic property. This work provided a simple method without using any organic solvents, organic metal salts, or surfactants which could easily obtain monodisperse nanoparticles with tunable morphology.
Highlights
Iron oxide nanoparticles have proved to be very promising, and they were widely used for magnetic separation, drug delivery, cancer hyperthermia, magnetic resonance imaging (MRI), targeted cancer therapy, multiparametric detection [1,2,3,4,5,6,7,8,9], and so forth
The particle isoelectric point (IEP) of the precursor and the product was found around pH 4.5 and pH 6, respectively
Monodisperse iron oxide nanoparticles with NaOH and NH3⋅H2O as precipitants have been successfully prepared through precipitation method
Summary
Iron oxide nanoparticles (mostly Fe3O4) have proved to be very promising, and they were widely used for magnetic separation, drug delivery, cancer hyperthermia, magnetic resonance imaging (MRI), targeted cancer therapy, multiparametric detection [1,2,3,4,5,6,7,8,9], and so forth In these respects, iron oxide nanoparticles must be monodisperse, highly crystalline, and water-soluble, which could provide reproducible quality, high magnetization values, and good biocompatibility under biological conditions [10, 11]. The results showed the general applicability of oleic acid salts as stabilizers in wellcontrolled nanocrystals synthesis. The effects of the two different precipitants were studied
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