Journal of Nanoparticle Research

, Volume 12, Issue 6, pp 2051–2056 | Cite as

Composition distributions in FePt(Au) nanoparticles

  • C. Srivastava
  • D. E. Nikles
  • J. W. Harrell
  • G. B. Thompson
Research Paper


Ternary alloy FePt(Au) nanoparticles were prepared by the co-reduction of platinum(II) acetylacetonate and gold(III) acetate and the thermal decomposition of iron pentacarbonyl in hot phenyl ether in the presence of oleic acid and oleylamine ligands. This gave spherical particles with an average diameter of 4.4 nm with a range of diameters from approximately 1.6–9 nm. The as-synthesized particles had a solid solution, face-centered-cubic structure. Though the average composition of the particles was Fe44Pt45Au11, individual particle analysis by Scanning Transmission Electron Microscopy–X-ray Energy Dispersive Spectroscopy showed a broad distribution in composition. In general, smaller-sized particles tended to have a lower amount of Au as compared to larger-sized particles. As the Au content increased, the ratio of Fe/Pt widened.


FePt Nanoparticles Compositional distributions Synthesis 



The authors gratefully acknowledge the National Science Foundation Materials Research Science and Engineering Center (DMR-0213985) for supporting this work as well as the University of Alabama Materials Science graduate fellowship program. The Tecnai TEM was acquired through the National Science Foundation Major Instrumentation Program (DMR-0421376). The authors thank Professor John Chapman of the University of Glasgow, Scotland, for helpful discussions.


  1. Bagaria HG, Johnson DT, Srivastava C, Thompson GB, Shamsuzzoha M, Nikles DE (2007) Formation of FePt nanoparticles by organometallic synthesis. J Appl Phys 101: 104313-1–104313-5Google Scholar
  2. Barbour JC, Sikafus K, Nastasi M (1985) Calibration of an energy dispersive spectroscopy k factor using Rutherford backscattering. J Vac Sci Technol A 5:1895–1899CrossRefADSGoogle Scholar
  3. Carlino E, Grillo V (2005) Atomic-resolution quantitative composition analysis using scanning transmission electron microscopy Z-contrast experiments. Phys Rev B 71: 235303-1–235303-5Google Scholar
  4. Dai ZR, Sun S, Wang ZL (2001) Phase transformation, coalescence, and twinning of monodisperse FePt nanocrystals. Nano Lett 1:443–447CrossRefADSGoogle Scholar
  5. Harrell JW, Nikles DE, Kang SS, Sun XC, Jia Z, Shi S, Lawson J, Thompson GB, Srivastava C, Seetala NV (2005) Effect of metal additives on L10 ordering of chemically synthesized FePt nanoparticles. Scripta Mater 53:411–416CrossRefGoogle Scholar
  6. Kang SS, Jia Z, Nikles DE, Harrell JW (2003a) Synthesis, self-assembly, and magnetic properties of [FePt]1-xAux nanoparticles. IEEE Trans Magn 39:2753–2757CrossRefADSGoogle Scholar
  7. Kang SS, Nikles DE, Harrell JW (2003b) Synthesis, chemical ordering, and magnetic properties of self-assembled FePt–Ag nanoparticles. J Appl Phys 93:7178–7181CrossRefADSGoogle Scholar
  8. Klemmer TJ, Liu C, Shukla N, Wu X, Weller D, Tanase M, Laughlin DE, Soffa WA (2003) Combined reactions associated with L10 ordering. J Magn Magn Mater 266:79–87CrossRefADSGoogle Scholar
  9. Srivastava C, Balasubramanian J, Thompson GB, Turner CH, Wiest JM, Bagaria HG (2007) Formation mechanism and composition distribution of FePt Nanoparticles. J Appl Phys 102: 104310-1–104310-8)Google Scholar
  10. Srivastava C, Nikles DE, Thompson GB (2008a) Composition evolution during the synthesis of FePt nanoparticles. J Appl Phys 104: 064315-1–064315-7)Google Scholar
  11. Srivastava C, Nikles DE, Thompson GB (2008b) Tailoring nucleation and growth condition for narrow compositional distribution for colloidal synthesized FePt nanoparticles. J Appl Phys 104: 104314-1–104314-7)Google Scholar
  12. Sun S, Murray CB, Weller D, Folks L, Moser A (2000) Monodisperse FePt nanoparticles and ferromagnetic FePt nanocrystal superlattices. Science 287:1989–1992CrossRefPubMedADSGoogle Scholar
  13. Yu ACC, Mizuno M, Sasaki Y, Kondo H (2004) Atomic composition effect on the ordering of solution-phase synthesized FePt nanoparticle films. Appl Phys Lett 85:6242–6244CrossRefADSGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • C. Srivastava
    • 1
  • D. E. Nikles
    • 2
  • J. W. Harrell
    • 3
  • G. B. Thompson
    • 1
  1. 1.Department of Metallurgical and Materials EngineeringThe University of AlabamaTuscaloosaUSA
  2. 2.Department of ChemistryThe University of AlabamaTuscaloosaUSA
  3. 3.Department of Physics and AstronomyThe University of AlabamaTuscaloosaUSA

Personalised recommendations