Journal of Nanoparticle Research

, Volume 4, Issue 3, pp 261–264

Properties of Ferrofluid Nanoparticles Prepared by Coprecipitation and Acid Treatment

  • Jian Li
  • Dalin Dai
  • Baogang Zhao
  • Yueqiang Lin
  • Cenye Liu
Article

DOI: 10.1023/A:1019920629506

Cite this article as:
Li, J., Dai, D., Zhao, B. et al. Journal of Nanoparticle Research (2002) 4: 261. doi:10.1023/A:1019920629506

Abstract

A new stable acid water-based CoFe2O4 ferrofluid is prepared by coprecipitation and acid treatment. The properties of the nanoparticles forming the ferrofluid are examined by means of X-ray diffraction, vibrating sample magnetometer, scanning tunneling microscopy, transmission electron microscopy and annihilation technique. The results show that the particles are cubic CoFe2O4 nanoparticles, which have an average diameter of 12.2 nm and are coated with a low density porous amorphous layer. The CoFe2O4 particles in an acid aqueous medium exist in two kinds of forms, one is a single spherical particle and another is an aggregation of several spherical particles.

ferrofluidnanoparticleCoFe2O4acid treatment

Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • Jian Li
    • 1
  • Dalin Dai
    • 2
  • Baogang Zhao
    • 1
  • Yueqiang Lin
    • 1
  • Cenye Liu
    • 1
  1. 1.Physics DepartmentSouthwest China Normal UniversityChongqingChina
  2. 2.Life-Science DepartmentSouthwest China Normal UniversityChongqingChina