Hyeon Taeghwan
National Creative Research Initiative Center for Oxide Nanocrytalline Materials and School of Chemical Engineering, Seoul National University, Seoul 151-744, Korea.
Chem Commun (Camb). 2003 Apr 21(8):927-34. doi: 10.1039/b207789b.
Recent advances in the synthesis of various magnetic nanoparticles using colloidal chemical approaches are reviewed. Typically, these approaches involve either rapid injection of reagents into hot surfactant solution followed by aging at high temperature, or the mixing of reagents at a low temperature and slow heating under controlled conditions. Spherical cobalt nanoparticles with various crystal structures have been synthesized by thermally decomposing dicobalt octacarbonyl or by reducing cobalt salts. Nanoparticles of Fe-Pt and other related iron or cobalt containing alloys have been made by simultaneously reacting their constituent precursors. Many different ferrite nanoparticles have been synthesized by the thermal decomposition of organometallic precursors followed by oxidation or by low-temperature reactions inside reverse micelles. Rod-shaped iron nanoparticles have been synthesized from the oriented growth of spherical nanoparticles, and cobalt nanodisks were synthesized from the thermal decomposition of dicobalt octacarbonyl in the presence of a mixture of two surfactants.
综述了采用胶体化学方法合成各种磁性纳米粒子的最新进展。通常，这些方法包括将试剂快速注入热的表面活性剂溶液中，然后在高温下老化，或者在低温下混合试剂并在受控条件下缓慢加热。通过热分解二钴八羰基化合物或还原钴盐，合成了具有各种晶体结构的球形钴纳米粒子。通过同时使铁 - 铂及其它相关含铁或钴合金的组成前驱体发生反应，制备出了这些合金的纳米粒子。通过有机金属前驱体的热分解，随后进行氧化或通过反胶束内的低温反应，合成了许多不同的铁氧体纳米粒子。由球形纳米粒子的定向生长合成了棒状铁纳米粒子，在两种表面活性剂的混合物存在下，通过二钴八羰基化合物的热分解合成了钴纳米盘。
