tailieunhanh - báo cáo hóa học:" Synthesis and Magnetic Properties of Nearly Monodisperse CoFe2O4 Nanoparticles Through a Simple "

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Synthesis and Magnetic Properties of Nearly Monodisperse CoFe2O4 Nanoparticles Through a Simple | Nanoscale Res Lett 2010 5 1039-1044 DOI s11671-010-9599-9 NANO EXPRESS Synthesis and Magnetic Properties of Nearly Monodisperse CoFe2O4 Nanoparticles Through a Simple Hydrothermal Condition Xing-Hua Li Cai-Ling Xu Xiang-Hua Han Liang Qiao Tao Wang Fa-Shen Li Received 5 January 2010 Accepted 31 March 2010 Published online 16 April 2010 The Author s 2010. This article is published with open access at 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 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 . Li . Xu . Han L. Qiao T. Wang . Li Institute of Applied Magnetics Key Laboratory of Magnetism and Magnetic Materials of Ministry of Education Lanzhou University 730000 Lanzhou People s Republic of China e-mail wtao@ . Li e-mail lifs@ . Xu Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province Lanzhou University 730000 Lanzhou People s Republic of China Introduction CoFe2O4 as a type of magnetic materials has long been of intensive importance in the fundamental sciences and technological applications in various fields of electronics 1 photomagnetism 2 catalysis 3 .