Polymer-assisted size control of water-dispersible iron oxide nanoparticles in range between 15-100 nm

P. TANCREDI; O. BOTASINI; O. MOSCOSO LONDOÑO; EDUARDO MÉNDEZ; L. M. SOCOLOVSKY

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2015 vol. 464 p. 46 - 51

0927-7757

Starch-coated Fe3O4 nanoparticles were synthesized by the precipitation-oxidation of ferroushydroxide method. Starch was employed as a kinetic control agent, and the effect of thepolymer on both size and aggregation of the Fe3O4 nanoparticles was studied.The size of the aspreparedmagnetite nanoparticles was tuned from 15 to 100 nm by changing the time of additionof a starch solution on the reaction system. Also, the starch-coating over Fe3O4 nanoparticlesassures good water-dispersibility, stability, and possible biocompatibility. Transmission andScanning Electron Microscopies (TEM, SEM), X-ray diffraction (XRD), Fourier TransformInfrared Spectroscopy (FTIR) and Magneticmeasurements were used to characterize theprepared samples.Kinetic control assays were also done with polyethylene glycol and polyvinyl alcohol in orderto study the influence of the polymer nature in the size and aggregation process of the Fe3O4nanoparticles. For this work, the effect is more pronounced for voluminous polymers, with largeelectrosteric hindrance produced by increased polar groups per monomer, like starch.