Polyvinylpyrrolidone (PVP)-coated sub-5 nm monosize Fe3O4 nanoparticles were synthesized by reduction of Fe(III) acetylacetonate in the presence of PVP polymer as surfactant in one-pot polyol process. Their microstructure and magnetic properties were characterized by XRD, TEM/HRTEM and VSM. It is found that the nanoparticles have high crystallinity with distinct lattices and the magnetic measurements reveal their well-defined superparamagnetic behavior at room temperature. Such Fe3O4 nanoparticles with tailorable size and tunable magnetic properties are promising for biomedical applications.
Bibliographical noteFunding Information:
This work was supported by Korea Research Foundation Grants KRF-2004-005-D00057 and KRF-2005-210-D00023, Korea Health 21 R&D Project, Ministry of Health & Welfare (No. A050750), and Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MOST) (No. M60501000045-05A0100-04510).
- Polyol synthesis
- Ultrasmall size
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics