Sub 5 nm Fe3O4 nanocrystals via coprecipitation method

Jun Hua Wu, Seung Pil Ko, Hong Ling Liu, Myung Hwa Jung, Ju Hun Lee, Jae Seon Ju, Young Keun Kim

Research output: Contribution to journalArticlepeer-review

67 Citations (Scopus)


Magnetite nanocrystals of 2-4 nm were synthesized by a chemical coprecipitation method, by which the particle size was controlled by the reaction temperature. The nanocrystals were investigated by XRD, TEM/HRTEM, VSM and SQUID. It is found that the nanocrystals reveal well-defined superparamagnetic behavior before and after annealing, while the observation of the distinct lattices manifest the high crystallinity of the ultrasmall particles.

Original languageEnglish
Pages (from-to)268-272
Number of pages5
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Publication statusPublished - 2008 Feb 1


  • Magnetic
  • Magnetite
  • Nanocrystals
  • Superparamagnetic

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry


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