Title of article :
Silica coated ferrite nanoparticles: Influence of citrate functionalization procedure on final particle morphology
Author/Authors :
Bojana Moji?، نويسنده , , Konstantinos P. Giannakopoulos، نويسنده , , ?eljka Cveji?، نويسنده , , Vladimir V. Srdic، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Abstract :
In this paper, magnetic nanoparticles (Fe3O4 and NiFe2O4) were coated with a biocompatible silica shell via hydrolysis and condensation of tetraethyl orthosilicate (TEOS) by the Stöber process. Magnetic nanoparticles, prepared by chemical co-precipitation from iron and nickel salts, were functionalized with citric acid, in order to provide their deagglomeration and to enable their coating with silica. The parameters of the functionalization procedure were varied (concentration–pH and type of treatment), in order to examine if and how this particular step of preparation affects the final morphology of the core-shell particles. Transmission electron microscopy, zeta potential and particle size measurements revealed that the morphology and the size of obtained core shell particles depend significantly on the core particle size, and thus on the parameters of the functionalization step.
Keywords :
A. Powders: chemical preparation , B. Nanocomposites , D. Ferrites
Journal title :
Ceramics International
Journal title :
Ceramics International