학술논문
Fe-containing nanoparticles on the surface of silica microgranules.
Document Type
Article
Author
Source
Subject
*SILICA
*SILICON compounds
*NANOPARTICLES
*MAGNETIC properties
*OXIDES
*PHYSICAL & theoretical chemistry
*
*
*
*
*
Language
ISSN
0020-1685
Abstract
We have prepared nanomaterials consisting of SiO2 microgranules and Fe-containing nanoparticles on their surface and determined the size and composition of the nanoparticles. The nanoparticles are shown to have a core-shell structure (α-Fe core and γ-Fe2O3 shell). The α-Fe core and Fe2O3 shell are responsible, respectively, for the broad and narrow lines in the EMR spectrum of the nanoparticles. The magnetic properties of larger nanoparticles are dominated by the core, while those of smaller nanoparticles are dominated by the oxide shell. [ABSTRACT FROM AUTHOR]