Nano Express

Nanoscale Research Letters

, Volume 5, Issue 6, pp 1039-1044

Open Access This content is freely available online to anyone, anywhere at any time.

Synthesis and Magnetic Properties of Nearly Monodisperse CoFe2O4 Nanoparticles Through a Simple Hydrothermal Condition

  • Xing-Hua LiAffiliated withInstitute of Applied Magnetics, Key Laboratory of Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University
  • , Cai-Ling XuAffiliated withInstitute of Applied Magnetics, Key Laboratory of Magnetism and Magnetic Materials of Ministry of Education, Lanzhou UniversityKey Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Lanzhou University
  • , Xiang-Hua HanAffiliated withInstitute of Applied Magnetics, Key Laboratory of Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University
  • , Liang QiaoAffiliated withInstitute of Applied Magnetics, Key Laboratory of Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University
  • , Tao WangAffiliated withInstitute of Applied Magnetics, Key Laboratory of Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University Email author 
  • , Fa-Shen LiAffiliated withInstitute of Applied Magnetics, Key Laboratory of Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University Email author 

Abstract

Nearly monodisperse cobalt ferrite (CoFe2O4) nanoparticles without any size-selection process have been prepared through an alluring method in an oleylamine/ethanol/water system. Well-defined nanospheres with an average size of 5.5 nm have been synthesized using metal chloride as the law materials and oleic amine as the capping agent, through a general liquid–solid-solution (LSS) process. Magnetic measurement indicates that the particles exhibit a very high coercivity at 10 K and perform superparamagnetism at room temperature which is further illuminated by ZFC/FC curves. These superparamagnetic cobalt ferrite nanomaterials are considered to have potential application in the fields of biomedicine. The synthesis method is possible to be a general approach for the preparation of other pure binary and ternary compounds.

Keywords

Monodisperse Cobalt ferrite Superparamagnetic Nanoparticles Magnetic Biomedcine