Low-temperature solution synthesis of chemically functional ferromagnetic FePtAu nanoparticles

S.S. Kinge, T. Gang, W.J.M. Naber, J.A. Boschker, Augustinus J.H.M. Rijnders, David Reinhoudt, Wilfred Gerard van der Wiel

Research output: Contribution to journalArticleAcademicpeer-review

18 Citations (Scopus)

Abstract

Magnetic nanoparticles are of great scientific and technological interest. The application of ferromagnetic nanoparticles for high-density data storage has great potential, but energy efficient synthesis of uniform, isolated, and patternable nanoparticles that remain ferromagnetic at room temperature is not trivial. Here, we present a low-temperature solution synthesis method for FePtAu nanoparticles that addresses all those issues and therefore can be regarded as an important step toward applications. We show that the onset of the chemically ordered face-centered tetragonal (L10) phase is obtained for thermal annealing temperatures as low as 150 C. Large uniaxial magnetic anisotropy (107 erg/cm3) and a high long-range order parameter have been obtained. Our low-temperature solution annealing leaves the organic ligands intact, so that the possibility for postanneal monolayer formation and chemically assisted patterning on a surface is maintained.
Original languageEnglish
Pages (from-to)3220-3224
Number of pages5
JournalNano letters
Volume9
Issue number9
DOIs
Publication statusPublished - 19 Aug 2009

Keywords

  • IR-69065
  • METIS-260478
  • EWI-16134

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