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Ferroelectrics Volume 421, 2011 - Issue 1
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Original Articles

Fabrication of FePt@Au Nanoparticles by Reverse Micelle Method

J. K. Tsai Department of Electronic Engineering, National Formosa University, Yunlin, 632, Taiwan; Institute of Electro-Optical and Materials Science, National Formosa University, Yunlin, 632, Taiwan
,
T. L. Wu Institute of Electro-Optical and Materials Science, National Formosa University, Yunlin, 632, Taiwan
,
S. M. Chao Department of Electronic Engineering, Hsiuping Institute of Technology, Taichung, 412, Taiwan
,
K. T. Lam Department of Information Communication, Leader University, Tainan, 709, Taiwan
,
T. H. Meen Department of Electronic Engineering, National Formosa University, Yunlin, 632, Taiwan; Institute of Electro-Optical and Materials Science, National Formosa University, Yunlin, 632, Taiwan
,
C. J. Huang Department of Applied Physics, National University of Kaohsiung, Nan-Tzu, 811, Kaohsiung, Taiwan
&
W. R. Chen Department of Electronic Engineering, National Formosa University, Yunlin, 632, Taiwan
 show all
Pages 43-49 | Received 12 Aug 2010, Published online: 13 Oct 2011
 
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Abstract

In this study, magnetic iron platinum alloy-core/gold-shell (FePt@Au) nanoparticles (NPs) were synthesized using the reverse micelle technique under ambient pressure at 25°C. Gold-coated NPs are prevented FePt oxidation and allowed the samples to be manipulated without additional precautions to prevent oxidation. FePt@Au NPs were successfully fabricated and demonstrated by X-ray diffractometry (XRD) and ultraviolet-visible absorption spectra. Transmission electron microscopy (TEM) reveals the average diameter of FePt@Au NPs is about 5.7 nm. The result of superconducting quantum interference device (SQUID) magnetometry shows it was super-paramagnetic, the blocking temperature and the coercive field of 26 K and 350 Oe, respectively.

Acknowledgments

This project was supported in part by National Research Council of Taiwan (NSC 97-2112-M-150-002 and NSC 97-2221-E-150-008).

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