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Magnetic SiO2/Fe3O4 colloidal crystals

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Published 14 January 2008 • IOP Publishing Ltd
, , Citation Chih-Kai Huang et al 2008 Nanotechnology 19 055701 DOI 10.1088/0957-4484/19/05/055701

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Author affiliations

1 Institute of Polymer Science and Engineering, National Taiwan University, Taipei, Taiwan

2 Department of Optics and Photonics, National Central University, Jung-Li City, Taoyuan, Taiwan

3 Department of Polymer Materials, Vanung University, Jung-Li City, Taoyuan, Taiwan

Dates

  1. Received 8 August 2007
  2. Published

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0957-4484/19/5/055701

Abstract

We proposed a novel technique to fabricate colloidal crystals by using monodisperse SiO2 coated magnetic Fe3O4(SiO2/Fe3O4) microspheres. The magnetic SiO2/Fe3O4 microspheres with a diameter of 700 nm were synthesized in the basic condition with ferric sulfate, ferrous sulfate, tartaric acid and tetraethyl orthosilicate (TEOS) in the reaction system. Monodisperse SiO2/Fe3O4 superparamagnetic microspheres have been successfully used to fabricate colloidal crystals under the existing magnetic field.

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10.1088/0957-4484/19/05/055701