Synthesis and Characterization of Structure Controlled Nano-cobalt Particles

Shiqiang Hui, Mingzhong Wu, Shihui Ge, Dajing Yan, Y. D. Zhang, T. D. Xiao, M. J. Yacaman, M. Miki-Yoshida, W. A. Hines, J. I. Budnick

Research output: Contribution to journalConference articlepeer-review

6 Scopus citations


Nanostructured cobalt particles with and without a ceramic coating have been synthesized using a wet chemical method. The structure and magnetic properties of synthesized powder were characterized using x-ray diffraction ("XRD"), high-resolution transmission electron microscopy ("HRTEM"), and a Quantum Design (SQUID) magnetometer. The cobalt nanoparticles are of either face-centered cubic ("fcc") and/or hexagonally close-packed ("hcp") crystalline structures. The average grain size is ∼14 nm for cobalt (either fcc or hcp) with an amorphous silica coating, and the average grain size is ∼9 nm for hcp cobalt and 26 nm for fcc cobalt without a silica coating. The effect of annealing temperature on grain size and magnetic properties are addressed.

Original languageEnglish (US)
Pages (from-to)159-164
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
StatePublished - 2003
Externally publishedYes
EventSolid-State Chemistry of Inorganic Materials IV - Boston, MA, United States
Duration: Dec 2 2002Dec 6 2002

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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