Nano Research

, Volume 4, Issue 4, pp 370–375

Fe3O4 octahedral colloidal crystals

  • L-r Meng
  • Weimeng Chen
  • Yiwei Tan
  • Lin Zou
  • Chinping Chen
  • Heping Zhou
  • Qing Peng
  • Yadong Li
Research Article

DOI: 10.1007/s12274-010-0091-8

Cite this article as:
Meng, L., Chen, W., Tan, Y. et al. Nano Res. (2011) 4: 370. doi:10.1007/s12274-010-0091-8

Abstract

We present a facile and controllable method for the large-scale fabrication of highly-ordered octahedral Fe3O4 colloidal “single crystals” without the assistance of a substrate. Oleic acid is used to reduce the solubility of the nano-building blocks in colloidal solution and to induce a “crystallization” process. Our colloidal crystals are of multimicron size and show typical crystallographic characteristics. They have a very robust structure and can serve as a novel ordered magnetic mesoporous material with a relatively narrow pore size distribution. The sample possesses an extremely high Verwey transition temperature (TV) of 100 K and a high saturation magnetization (MS) of 86 emu/g at 5 K based on its good crystallinity, as well as the interparticle dipolar interaction behavior arising from its unique structure. Electrochemical measurements have demonstrated the excellent capacity of the mesoporous colloidal crystals when used in lithium-ion batteries.
https://static-content.springer.com/image/art%3A10.1007%2Fs12274-010-0091-8/MediaObjects/12274_2010_91_Fig1_HTML.jpg

Keywords

Fe3O4self-assemblysuperlatticemagnetic mesoporous materialelectrode materialVerwey transition

Supplementary material

12274_2010_91_MOESM1_ESM.pdf (1.7 mb)
Supplementary material, approximately 340 KB.

Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • L-r Meng
    • 1
  • Weimeng Chen
    • 2
  • Yiwei Tan
    • 1
  • Lin Zou
    • 1
  • Chinping Chen
    • 2
  • Heping Zhou
    • 1
  • Qing Peng
    • 1
  • Yadong Li
    • 1
  1. 1.State Key Laboratory of New Ceramics and Fine Processing, Department of Chemistry and Department of Materials Science and EngineeringTsinghua UniversityBeijingChina
  2. 2.Department of PhysicsPeking UniversityBeijingChina