以聚乙二醇(PEG)为溶剂,高温热分解乙酰丙酮铁(Fe(acac)3)合成了磁性氧化铁纳米粒子.为改善氧化铁纳米粒子表面性能和生物应用潜能,分别用N,N二甲基甲酰胺和聚酰胺-胺(PAMAM)进行表面修饰,在氧化铁纳米粒子表面接枝-NH2活性官能团.分别采用X射线衍射仪(XRD)、透射电镜(TEM)、红外光谱(FT-IR)、动态光散射(DSL)对样品进行了表征测试.XRD和TEM结果表明高温热分解法合成的纳米粒子平均粒径为10 nm,具有较好的结晶性和单分散性;FT-IR、DSL粒径和表面电位测试结果表明氨基官能团成功修饰在氧化铁纳米粒子表面,同时使氧化铁纳米粒子在水溶液中的稳定性增强.
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