Synthesis and Magnetic Properties of Nearly Monodisperse CoFe₂O₄Nanoparticles Through a Simple Hydrothermal Condition

• Main Authors: Li Xing-Hua, Xu Cai-Ling, Han Xiang-Hua, Qiao Liang, Wang Tao, Li Fa-Shen
• Format: Article
• Language: English
• Published: SpringerOpen 2010-01-01
• Series: Nanoscale Research Letters
• Subjects: Monodisperse; Cobalt ferrite; Superparamagnetic; Nanoparticles; Magnetic; Biomedcine
• Online Access: http://dx.doi.org/10.1007/s11671-010-9599-9
• ISSN: 1931-7573; 1556-276X

<p>Abstract</p> <p>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&#8211;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.</p>