Structural and magnetic characterization of functional surface coated maghemite nanoparticles

Author

Demchenko, P. ; Mitina, N. ; Zaichenko, A. ; Nedelko, N. ; Lewinska, S. ; Slawska-Waniewska, A. ; Dluzewski, P. ; Bilska, M. ; Ubizskii, S.

Author_Institution

Institute of Physics, Polish Academy of Sciences, Warsaw, Poland

fYear

2012

fDate

3-7 Sept. 2012

Firstpage

268

Lastpage

269

Abstract

Nanoparticles composed of magnetic γ-Fe2O3 core and organic shell were synthesized via template synthesis in the presence of functional oligoperoxide surfactants and further graft-polymerization initiated from their surface. X-ray diffraction (XRD), transmission electron microscopy (TEM) and magnetic measurements (PPMS) were used to characterize the obtained magnetic system of core-shell nanoparticles. XRD results confirm the existence of γ-Fe2O3 phase as well as show an average diameter of nanoparticles around 10 nm. The obtained particles are superparamagnetic at the room temperature. Magnetic measurements indicate also sufficiently strong dipolar interparticle interactions at low temperatures.

Keywords

Magnetic cores; Magnetic separation; Magnetization; Nanoparticles; Surface treatment; Temperature; Temperature measurement; core-shell γ-Fe2O3 nanoparticles; dipolar interparticle interactions;

fLanguage

English

Publisher

ieee

Conference_Titel

Oxide Materials for Electronic Engineering (OMEE), 2012 IEEE International Conference on

Conference_Location

Lviv, Ukraine

Print_ISBN

978-1-4673-4491-3

Type

conf

DOI

10.1109/OMEE.2012.6464772

Filename

6464772