Size- and shape-controlled synthesis of monodisperse Co nanoparticles from cobalt acetate by thermal decomposition

稀有金属（英文版）, 2009, 28(3): 241-244. doi: 10.1007/s 12598-009-0047-x

^1, , ^2, , ^3, , ^4, , ^5,

1.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

2.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

3.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

4.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

5.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

基金项目: the Scientific Research Foundation for the Returned Overseas Chinese Scholars State Education Ministry and the National Natural Science Foundation of China(50774010)

Size- and shape-controlled synthesis of monodisperse Co nanoparticles from cobalt acetate by thermal decomposition

LIN Tao ^1, , SHAO Huiping ^2, , GUO Zhimeng ^3, , LUO Ji ^4, , HAO Junjie ^5,

1.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

2.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

3.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

4.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

5.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

Keywords： cobalt nanoparticles

Monodisperse cobalt nanoparticles with relatively high coercivities were synthesized by thermal decomposition of cobalt acetate for the application of ultra-high density magnetic recording media. Without using any reducing agents, Co nanoparticles of 13.9-21.3 nm in size were prepared using various protecting agents and a high boiling point solvent trioctylamine. The Co nanoparticles prepared with the mixture of oleic acid, oleylarnine, and polyvinylpyrrolidone (PVP) showed clear crystalline structure of face centered cubic, and their coercivity was measured to be 27.2 kA/m PVP was effective in controlling particle growth while hindering agglomeration between the particles. The as-prepared Co nanoparticles with a moderate coercivity can be applicable to patterned media.

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Size- and shape-controlled synthesis of monodisperse Co nanoparticles from cobalt acetate by thermal decomposition

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