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Nano Research 2009, 2(5): 380-385 https://doi.org/10.1007/s12274-009-9037-4
Research Article | Open Access | Issue | Published: 01 May 2009

Synthesis of High Magnetic Moment CoFe Nanoparticles via Interfacial Diffusion in Core/Shell Structured Co/Fe Nanoparticles

Show Author's Information Chao Wang1,2,†,  Sheng Peng1,†,  Lise-Marie Lacroix1,  Shouheng Sun1( )
Department of ChemistryBrown UniversityProvidenceRhode Island02912USA
Current Address: Materials Science DivisionArgonne National LaboratoryArgonneIL60439USA

† These two authors made an equal contribution to the work.

Keywords:
chemical synthesis, magnetic nanoparticles, core/shell nanoparticles, CoFe nanoparticles
Cite this article:
Wang C, Peng S, Lacroix L-M, et al. Synthesis of High Magnetic Moment CoFe Nanoparticles via Interfacial Diffusion in Core/Shell Structured Co/Fe Nanoparticles. Nano Research, 2009, 2(5): 380-385. https://doi.org/10.1007/s12274-009-9037-4
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Abstract Full text Electronic supplementary material About this article

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 ℃.


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About this article

Synthesis of High Magnetic Moment CoFe Nanoparticles via Interfacial Diffusion in Core/Shell Structured Co/Fe Nanoparticles

Show Author's information Chao Wang1,2,†, Sheng Peng1,†, Lise-Marie Lacroix1, Shouheng Sun1( )
Department of ChemistryBrown UniversityProvidenceRhode Island02912USA
Current Address: Materials Science DivisionArgonne National LaboratoryArgonneIL60439USA

† These two authors made an equal contribution to the work.

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 ℃.

Keywords: chemical synthesis, magnetic nanoparticles, core/shell nanoparticles, CoFe nanoparticles

References(15)

1

Sun, S.; Murray, C. B.; Weller, D.; Folks, L.; Moser, A. Monodisperse FePt nanoparticles and ferromagnetic FePt nanocrystal superlattices. Science 2000, 287, 1989–1992.
DOI Google Scholar
2

Lacheisserie, E. T.; Gignoux, D.; Schlenker, M. Magnetism: Materials and Spplications; Springer, 2004.
3

Bader, S. D. Colloquium: Opportunities in nano-magnetism. Rev. Mod. Phys. 2006, 78, 1–15.
DOI Google Scholar
4

Lu, A. -H.; Salabas, E. L.; Schüth, F. Magnetic nanoparticles: Synthesis, protection, functionalization, and application. Angew. Chem. Int. Ed. 2007, 46, 1222–1244.
DOI Google Scholar
5

Lewin, M.; Carlesso, N.; Tung, C. -H.; Tang, X. -W.; Cory, D.; Scadden, D. T.; Weissleder, R. Tat peptide-derivatized magnetic nanoparticles allow in vivo tracking and recovery of progenitor cells. Nat. Biotechnol. 2000, 22, 47–52.
Google Scholar
6

Zhao, M.; Deauregard, D. A.; Loizou, L.; Davletov, B.; Brindle, K. M. Non-invasive detection of apoptosis using magnetic resonance imaging and a targeted contrast agent. Nat. Med. 2001, 7, 1241–1244.
DOI Google Scholar
7

Seo, W. S.; Lee, J. H.; Sun, X.; Suzuki, Y.; Mann, D.; Liu, Z.; Terashima, M.; Yang, P. C.; Mcconnell, M. V.; Nishimura, D. G.; Dai, H. FeCo/graphitic-shell nanocrystals as advanced magnetic-resonance-imaging and near-infrared agents. Nat. Mater. 2006, 5, 971–976.
DOI Google Scholar
8

Peng, S.; Wang, C.; Xie, J.; Sun, S. Synthesis and stabilization of monodisperse Fe nanoparticles. J. Am. Chem. Soc. 2006, 128, 10676–10677.
DOI Google Scholar
9

Xu, C.; Xie, J.; Ho, D.; Wang, C.; Kohler, N.; Walsh, E. G.; Morgan, J. R.; Chin, Y. E.; Sun, S. Au-Fe3O4 dumbbell nanoparticles as dual-functional Probes. Angew. Chem. Int. Ed. 2008, 47, 173–176.
DOI Google Scholar
10

Sun, C.; Lee, J.; Zhang, M. Magnetic nanoparticles in MR imaging and drug delivery. Adv. Drug Deliv. Rev. 2008, 60, 1252–1265.
DOI Google Scholar
11

Desvaux, C.; Amiens, C.; Fejes, P.; Renaud, P.; Respaud, M.; Lecante, P.; Snoeck, E.; Chaudret, B. Multimillimetre-large superlattices of air-stable iron-cobalt nanoparticles. Nat. Mater. 2005, 4, 750–753.
DOI Google Scholar
12

Chaubey, G. S.; Barcena, C.; Paudyal, N.; Rong, C.; Gao, J.; Sun, S.; Liu, J. P. Synthesis and stabilization of FeCo nanoparticles. J. Am. Chem. Soc. 2007, 129, 7214–7215.
DOI Google Scholar
13

Kim, J.; Rong, C.; Lee, Y.; Liu, J. P.; Sun, S. From core/shell structured FePt/FeO/MgO to ferromagnetic FePt nanoparticles. Chem. Mater. 2008, 20, 7242–7245.
DOI Google Scholar
14

Wang, C.; Peng, S.; Chan, R.; Sun, S. Synthesis of AuAg alloy nanoparticles from core/shell structured Ag/Au. Small, in press, DOI:10.1002/smll.200801169.
DOI Google Scholar
15

Hütten, A.; Sudfeld, D.; Ennen, I.; Reiss, G.; Wojczykowski, K.; Jutzi, P. Ferromagnetic FeCo nanoparticles for biotechnology. J. Mag. Mag. Mater. 2005, 293, 93–101.
DOI Google Scholar
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Publication history

Received: 25 December 2008
Revised: 15 February 2009
Accepted: 03 March 2009
Published: 01 May 2009
Issue date: May 2009

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© Tsinghua University Press and Springer-Verlag 2009

Acknowledgements

Acknowledgements

This work was supported by NSF/DMR 0606264, ONR/MURI N00014-05-1-0497 and the Brown University Seed Fund.Lise-Marie Lacroix thanks the French State/D4S grant for supporting her work at Brown University.

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This article is published with open access at Springerlink.com

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