采用部分还原沉淀法合成Fe3O4磁性粒子,通过热处理制度控制粒径和晶相的不同,得到磁性能表现不同的Fe3O4磁性粒子.利用透射电镜、原子力显微镜、激光粒度分析仪、X射线衍射仪、振动磁强计等对样品的粒度分布、晶相和磁性能进行表征.结果表明,不同热处理温度均可制备出粒度分布均匀的单分散的磁性粒子,且表现出较好的磁响应性、超顺磁性或者具有一定的磁滞和发热量,可以应用于生物分离、靶向药物载体或肿瘤热疗等不同的生物医学领域.
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