Spectroscopic and magnetic studies of highly dispersible superparamagnetic silica coated magnetite nanoparticles

Krzysztof Tadyszak; Ahmet Kertmen; Emerson Coy; Ryszard Andruszkiewicz; Sławomir Milewski; Irakli Kardava; Błażej Scheibe; Stefan Jurga; Katarzyna Chybczyńska

doi:10.1016/j.jmmm.2017.03.025

Spectroscopic and magnetic studies of highly dispersible superparamagnetic silica coated magnetite nanoparticles

Abstract

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.

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Authors (9)

Krzysztof Tadyszak
- Uniwersytet Adama Mickiewicza Centrum NanoBioMedyczne
Ahmet Kertmen
Emerson Coy
- Uniwersytet Adama Mickiewicza Centrum NanoBioMedyczne
Ryszard Andruszkiewicz prof. dr hab. inż.
Sławomir Milewski prof. dr hab. inż.
Irakli Kardava
- Uniwersytet Adama Mickiewicza Centrum NanoBioMedyczne
Błażej Scheibe dr inż.
- Uniwersytet Adama Mickiewicza Centrum NanoBioMedyczne
Stefan Jurga prof. dr hab.
- Uniwersytet Adama Mickiewicza Centrum NanoBioMedyczne
Katarzyna Chybczyńska
- Instytut Fizyki Molekularnej PAN

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Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS no. 433, pages 254 - 261,
ISSN: 0304-8853
Language:: English
Publication year:: 2017
Bibliographic description:: Tadyszak, K., Kertmen A., Coy E., Andruszkiewicz R., Milewski S., Kardava I., Scheibe B., Jurga S., Chybczyńska K.: Spectroscopic and magnetic studies of highly dispersible superparamagnetic silica coated magnetite nanoparticles// JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. -Vol. 433, (2017), s.254-261
DOI:: Digital Object Identifier (open in new tab) 10.1016/j.jmmm.2017.03.025
Verified by:: Gdańsk University of Technology