Superparamagnetic behavior in aqueously well dispersible magnetite core-shell Fe3O4@SiO2 nanoparticles is presented. The magnetic properties of core-shell nanoparticles were measured with use of the DC, AC magnetometry and EPR spectroscopy. Particles were characterized by HR-TEM and Raman spectroscopy, showing a crystalline magnetic core of 11.5 ± 0.12 nm and an amorphous silica shell of 22 ± 1.5 nm in thickness. The DC, AC magnetic measurements confirmed the superparamagnetic nature of nanoparticles, additionally the EPR studies performed at much higher frequency than DC, AC magnetometry (9 GHz) have confirmed the paramagnetic nature of the nanoparticles. Our results show the excellent magnetic behavior of the particles with a clear magnetite structure, which are desirable properties for environmental remediation and biomedical applications.
Authors
- Krzysztof Tadyszak,
- Ahmet Kertmen link open in new tab ,
- Emerson Coy,
- prof. dr hab. inż. Ryszard Andruszkiewicz link open in new tab ,
- prof. dr hab. inż. Sławomir Milewski link open in new tab ,
- Irakli Kardava,
- dr inż. Błażej Scheibe,
- prof. dr hab. Stefan Jurga,
- Katarzyna Chybczyńska
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1016/j.jmmm.2017.03.025
- Category
- Publikacja w czasopiśmie
- Type
- artykuł w czasopiśmie wyróżnionym w JCR
- Language
- angielski
- Publication year
- 2017
