Organometallic synthesis of β-CoAl Nanoparticles and β-CoAl/Al Nanoparticles and their behaviour upon Air exposure

Mirza Cokoja, Harish Parala, Alexander Birkner, Roland A. Fischer, Olivier Margeat, Diana Ciuculescu, Catherine Amiens*, Bruno Chaudret, Andrea Falqui, Pierre Lecante

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Nanocolloids of the intermetallic β-CoAl phase were prepared by a soft organomeiallic route. They were fully characterized by (HR)TEM, EDX, WAXS, XAS and SQUID magnetometry. Their exposure to air led to an increased saturation magnetization in agreement with Co/Al segregation and the formation of Co/Al2O3 nanocomposite, Furthermore, the βCoAl nanoparticles could be used as seeds to grow an aluminum, overlayer, which passivated the alloyed core against oxidation. These nanoparticles yielded stable colloidal solutions in aromatic solvents.

Original languageEnglish (US)
Pages (from-to)1599-1603
Number of pages5
JournalEuropean Journal of Inorganic Chemistry
Issue number11
DOIs
StatePublished - Apr 1 2010

Keywords

  • Alloys
  • Core-shell nanoparticles
  • Nanoparticles
  • Passivation
  • Synthetic methods

ASJC Scopus subject areas

  • Inorganic Chemistry

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