Effect of Zn nonmagnetic element doping and a polyvinyl pyrrolidone shell layer on the superparamagnetism and stability properties of magnetic nanoparticles

ZnxFe1−xFe2O4 nanoparticles (x = 0.0-0.25) were synthesized by the coprecipitation method. Their microstructure was investigated by X-ray diffraction with Rietveld refinement software, energy-dispersive X-ray spectroscopy, transmission electron microscopy, and Fourier transform infrared absorption s...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2021-02, Vol.60 (2), p.25001
Main Authors: Thi, Tran Minh, Trung, Vu Quoc, Tung, Do Khanh, Thanh, Pham Thi, Yen, Nguyen Hai, Lam, Nguyen Mau
Format: Article
Language:English
Subjects:
cation distribution
Core-shell structure
Fourier transforms
Infrared absorption
Infrared analysis
Iron oxides
Magnetic moments
Magnetic properties
Magnetic saturation
Magnetism
Magnetization
Magnetometers
Nanocomposites
Nanoparticles
Room temperature
Spectrum analysis
Superlattices
Thermogravimetric analysis
Zinc
Zn-doped Iron oxide/PVP
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Summary:ZnxFe1−xFe2O4 nanoparticles (x = 0.0-0.25) were synthesized by the coprecipitation method. Their microstructure was investigated by X-ray diffraction with Rietveld refinement software, energy-dispersive X-ray spectroscopy, transmission electron microscopy, and Fourier transform infrared absorption spectroscopy. Their thermal, magnetic properties were investigated by thermogravimetric analysis and vibrating-sample magnetometer. The nanoparticles exhibited superparamagnetic properties, with a maximum saturation magnetization of 80.2 emu g−1 in H = 11 000 Oe at room temperature for sample with x = 0.20. The Zn nonmagnetic element content is related to the cation distribution in the superlattices and magnetic moment of the particles. The Zn0.15Fe0.85Fe2O4 nanoparticles were coated with polyvinyl pyrrolidone (PVP) with different PVP mass. Their core-shell structure was investigated, the results showed that their chemical stability and saturation magnetization were greater than those of pure Fe3O4. PVP has biological compatibility; thus, Fe0.85Zn0.15Fe2O4/PVP0.75 nanocomposite has the potential to be widely used in medical biology, science and technology.
ISSN:0021-4922
1347-4065
DOI:10.35848/1347-4065/abd86d