Preparation and properties of silica-coated cobalt nanoparticles

Yoshio Kobayashi, Mitsuru Horie, Mikio Konno, Benito Rodríguez-González, Luis M. Liz-Marzán

Research output: Contribution to journalArticlepeer-review

245 Citations (Scopus)

Abstract

The synthesis of monodispersed, amorphous cobalt nanoparticles coated with silica in aqueous/ethanolic solution is described. Both the core size and the silica shell thickness can be controlled through the synthetic conditions. Furthermore, the transformation of the cobalt cores into crystalline, metallic cobalt upon annealing in air is demonstrated through X-ray diffraction data. Both the initial, amorphous nanoparticles and their crystalline counterpart are magnetic, which promises important applications for ferrofluid preparation and for magnetic recording media.

Original languageEnglish
Pages (from-to)7420-7425
Number of pages6
JournalJournal of Physical Chemistry B
Volume107
Issue number30
Publication statusPublished - 2003 Jul 31

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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