Silica shell cemented anisotropic architecture of Fe3O4 beads via magnetic-field-induced self-assembly

被引：22
作者：
Ha, Baoping [1 ]
Gao, Lian [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
来源：
SCRIPTA MATERIALIA | 2007年 / 56卷 / 08期
关键词：
Fe3O4-SiO2; bead; coating; self-organization and patterning; magnetic structure;
D O I：
10.1016/j.scriptamat.2006.12.045
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Fe3O4-SiO2 beads with diameters in the range of 200-550 nm were self-assembled into stable quasi-one-dimensional superstructures along the direction of an external magnetic field. The SiO2 shells, working as "cement", coalesced with each other and formed immobile linkages between adjacent Fe3O4 "bricks" and preserved the anisotropic structures. Additionally, the resultant quasi-one-dimensional structures can be oriented in an applied magnetic field, which makes them ideal candidates for functional devices such as magnetic microstirrers and magnetic switches. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：677 / 680
页数：4
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