Size- and shape-controlled synthesis of monodisperse Co nanoparticles from cobalt acetate by thermal decomposition
来源期刊：Rare Metals2009年第3期
论文作者：LIN Tao, SHAO Huiping, GUO Zhimeng, LUO Ji, and HAO Junjie School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing , China
文章页码：241 - 244
摘 要：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 agent, 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, oleylamine, 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.
LIN Tao, SHAO Huiping, GUO Zhimeng, LUO Ji, and HAO Junjie School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
摘 要：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 agent, 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, oleylamine, 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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