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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 合成单分散纳米粒子的最新综述
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Review Synthesis of Monodisperse Spherical Nanocrystals Jongnam Park, Dr., Jin Joo, Dr., Soon Gu Kwon, Youngjin Jang, Taeghwan Hyeon, Prof. Dr. * National Creative Research Initiative Center for Oxide Nanocrystalline Materials, and School of Chemical and Biological Engineering, Seoul National University, Seoul 151-744, Korea, Fax: (+82) 2-886-8457 email: Taeghwan Hyeon (thyeon@snu.ac.kr) *Correspondence to Taeghwan Hyeon, National Creative Research Initiative Center for Oxide Nanocrystalline Materials, and School of Chemical and Biological Engineering, Seoul National University, Seoul 151-744, Korea, Fax: (+82) 2-886-8457 Funded by: Korean Ministry of Science and Technology Keywords gold ?magnetic nanocrystals ?monodisperse nanocrystals ?noble metals ?quantum dots ?semiconductors Abstract Much progress has been made over the past ten years on the synthesis of monodisperse spherical nanocrystals. Mechanistic studies have shown that monodisperse nanocrystals are produced when the burst of nucleation that enables separation of the nucleation and growth processes is combined with the subsequent diffusion-controlled growth process through which the crystal size is determined. Several chemical methods have been used to synthesize uniform nanocrystals of metals, metal oxides, and metal chalcogenides. Monodisperse nanocrystals of CdSe, Co, and other materials have been generated in surfactant solution by nucleation induced at high temperature, and subsequent aging and size selection. Monodisperse nanocrystals of many metals and metal oxides, including magnetic ferrites, have been synthesized directly by thermal decomposition of metal-surfactant complexes prepared from the metal precursors and surfactants. Nonhydrolytic sol-gel reactions have been used to synthesize various transition-metal-oxide nanocrystals. Monodisperse gold nanocrystals have been obtained from polydisperse samples by digestive-ripening processes. Uniform-sized nanocrystals of gold, silver, platinum, and palladium have been synthesized by polyol processes in which metal salts are reduced by alcohols in the presence of appropriate surfactants. -------------------------------------------------------------------------------- |
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