Hetergeneous-nucleation synthesis of monodisperse ε-cobalt nanoparticles using palladium seeds

Haitao Yang, Tomoyuki Ogawa, Daiji Hasegawa, C. N. Chinnasamy, Migaku Takahashi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Monodisperse bimetallic Pd-Co nanoparticles were prepared via a thermal decomposition of cobalt carbonyl using palladium seeds at the Pd/Co molar ratios 0.5%, 1%, and 5%. The heterogeneously nucleated nanoparticles without any size-selective precipitation are sufficiently uniform to self-assemble into ordered arrays. The as-synthesized nanoparticles are each a single crystal with a complex cubic structure called ε{lunate}-Co. The presence of Pd seeds seems to improve the stability of Co nanoparticles against oxidation based on the results from time-dependent magnetization measurement.

Original languageEnglish
Pages (from-to)e10-e12
JournalJournal of Magnetism and Magnetic Materials
Volume304
Issue number1
DOIs
Publication statusPublished - 2006 Sep 1

Keywords

  • Heterogeneous nucleation
  • Magnetic properties
  • ε{lunate}-cobalt nanoparticles

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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