Silica coated ferrite nanoparticles: Influence of citrate functionalization procedure on final particle morphology

被引：41

作者：

Mojic, Bojana ^{[1
]}

Giannakopoulos, Konstantinos P. ^{[2
]}

Cvejic, Zeljka ^{[3
]}

Srdic, Vladimir V. ^{[1
]}

机构：

[1] Univ Novi Sad, Dept Mat Engn, Fac Technol, Novi Sad 21000, Serbia

[2] Natl Ctr Sci Res Demokritos, Inst Microelect, Athens, Greece

[3] Univ Novi Sad, Fac Nat Sci, Dept Phys, Novi Sad 21000, Serbia

来源：

CERAMICS INTERNATIONAL | 2012年 / 38卷 / 08期

关键词：

Powders: chemical preparation; Nanocomposites; Ferrites; COBALT FERRITE; MAGNETITE; STABILITY; SIZE;

D O I：

10.1016/j.ceramint.2012.05.050

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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 Stober 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. (C) 2012 Elsevier Ltd and Techna Group S.r.I. All rights reserved.

引用

页码：6635 / 6641

页数：7

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