Nano Research

, Volume 2, Issue 5, pp 380–385 | Cite as

Synthesis of high magnetic moment CoFe nanoparticles via interfacial diffusion in core/shell structured Co/Fe nanoparticles

  • Chao Wang
  • Sheng Peng
  • Lise-Marie Lacroix
  • Shouheng Sun
Open Access
Research Article

Abstract

We report the synthesis of high magnetic moment CoFe nanoparticles via the diffusion of Co and Fe in core/shell structured Co/Fe nanoparticles. In an organic solution, Co nanoparticles were coated with a layer of Fe to form a Co/Fe core/shell structure. Further raising the solution temperature led to inter-diffusion of Co and Fe and formation of CoFe alloy nanoparticles. These nanoparticles have high saturation magnetization of up to 192 emu/g CoFe and can be further stabilized by thermal annealing at 600 °C.

Keywords

CoFe nanoparticles core/shell nanoparticles magnetic nanoparticles chemical synthesis 

Supplementary material

12274_2009_9037_MOESM1_ESM.pdf (173 kb)
Supplementary material, approximately 340 KB.

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Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Chao Wang
    • 1
  • Sheng Peng
    • 1
  • Lise-Marie Lacroix
    • 1
  • Shouheng Sun
    • 1
  1. 1.Department of ChemistryBrown UniversityProvidenceUSA

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