Analytical and Bioanalytical Chemistry

, Volume 397, Issue 4, pp 1485–1491 | Cite as

Composition study of CoPt bimetallic nanocrystals of 2 nm

  • Arnaud DemortièreEmail author
  • Rémi Losno
  • Christophe Petit
  • Jean-Paul Quisefit
Original Paper


The synthesis of bimetallic alloy nanocrystals with a well-controlled relative composition is a real challenge and requires chemical analysis techniques with high accuracy. A new chemical route has been used to synthesize cobalt–platinum nanocrystals of 2-nm diameter in a wide range of relative stoichiometry. A study of the elemental composition of the nanoalloy was carried out by X-ray fluorescence (XRF) spectroscopy and energy-dispersive X-ray analysis. We have developed a set-up for XRF analysis using a silicon wafer as a support to determine the elemental composition with only a small amount of sample. The calibration step and the measurement capabilities are described. In a composition range of 25–75% cobalt, the results of both analytical methods are discussed and compared in detail.


CoPt nanoparticles Nanoparticle composition X-ray fluorescence spectroscopy Energy-dispersive X-ray analysis Nanoalloy Bimetallic nanocrystals 



The authors would like to express their gratitude to Dr. Anh-tu Ngo, LM2N (UMR 7070), Paris, France, for his work on the EDX analysis of nanocrystal samples.


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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Arnaud Demortière
    • 1
    Email author
  • Rémi Losno
    • 2
  • Christophe Petit
    • 1
  • Jean-Paul Quisefit
    • 2
  1. 1.Laboratoire des Matériaux Mésoscopiques et NanométriquesUMR CNRS 7070, Université Pierre et Marie CurieParis Cedex 05France
  2. 2.Laboratoire Inter-Universitaire des Systèmes AtmosphériquesUMR CNRS 7583CréteilFrance

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