Controlled synthesis and stability of Co@SiO2 aqueous colloids

M. Aslam, S. Li, V. P. Dravid*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


Magnetic nanoparticles have emerged as an important class of functional nanostructures with potential applications of magnetic resonance imaging, drug targeting, and bio-conjugation. We have developed a modified sol-gel approach to synthesize stable and well-dispersed magnetic Co@SiO2 nanoparticles with improved control over shell thickness and larger core diameters. These well-defined Co@SiO2 core-shell nanoparticles exhibit useful magnetic properties, and the protective silica shell allows them to be surface modified for bioconjugation for various biomedical applications. The core-shell nanoparticles were characterized by transmission electron microscopy, energy-dispersive spectroscopy, elemental mapping, and the line compositional analyses to demonstrate that uniform individually isolated coreshell nanoparticles are obtained through the improved synthetic route.

Original languageEnglish (US)
Pages (from-to)950-956
Number of pages7
JournalJournal of the American Ceramic Society
Issue number3
StatePublished - Mar 2007

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry


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