Synthesis and Characterization of Hydrophilic gama-Fe2O3 Nanoparticles for Biomedical Applications

Abstract

The hydrophilic g-Fe2O3 nanoparticles coated with polyvinylpyrrolidone (PVP) were prepared in one step of the modified polyol method combined with an additional heat treating. The presence of maghemite (g-Fe2O3) phase was confirmed by using X-ray diffraction (XRD) and Raman Spectrometry on powder. FT-IR spectroscopy confirmed the presence of PVP on the nanoparticles surface and the Zeta potential also supported the coating of nanoparticles with a layer of PVP and a good stability in aqueous medium. SEM analysis showed that the prepared g-Fe2O3 nanoparticles have a spherical structural morphology with the tendency of agglomeration. Hysteresis loop shows a ferromagnetic behaviour at room temperature with a saturation magnetization up to 57 emu/g.

Synthesis and Characterization of Water Dispersible Iron Oxide (�a-Fe2O3) Nanoparticles for Biomedical Applications

“…By the EDS analysis of the chemical composition of the samples it was evaluated the EDS spectrum of the as synthesized γ-Fe2O3 nanoparticles (Figure 3(a)). It was noticed the existence of Fe, O and C elements, the C element being related to the presence of PVP capping agent on the nanoparticle surface, also in agreement with the FT-IR analysis [29]. Further, EDS pattern of the L-lysine coated γ-Fe2O3 nanoparticles (Figure 3…”

“…However, considering that black color is characteristic for magnetite and brown for maghemite, the sample in our experiment is of brown color which supports the successful formation of the maghemite phase. The crystallite size was obtained using Debye-Scherer equation [29] considering the main peak (311). The crystallite size and the main parameters of the as obtained samples determined are presented in Table 1.…”

Preparation and Characterization of Fe3O4 Magnetic Nanofluid in Vegetable Oil

“…The presence of band at 3399.03 cm -1 is because of the O-H surface hydroxyl due to likely ethanol remaining of from washing [21].…”