| Polyol合成法制备生物医药用超小粒径Fe3O4磁性纳米晶体 |
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| 引用本文： | 刘红玲,吴君华.Polyol合成法制备生物医药用超小粒径Fe3O4磁性纳米晶体[J].化学研究,2008,19(3):9-13. |
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| 作者姓名： | 刘红玲 吴君华 |
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| 作者单位： | 1. 河南大学,化学化工学院,河南,开封,475004
2. 韩国高丽大学,工程技术研究所,韩国,首尔,136-713 |
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| 基金项目： | 河南大学校科研和教改项目 |
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| 摘 要： | 采用一罐polyol合成法还原Fe（Ⅲ）乙酰丙酮化合物制备了粒径可调、单分散、直径5nm以下的磁性Fe3O4纳米晶体．其晶粒表面为所用聚合物表面活性剂PVP所包覆．运用透射电镜／高分辨透射电镜、X射线衍射、振动样品磁强计和超导量子干涉仪对其结构和性能进行了表征．结果表明所制得的Fe3O4磁性纳米晶体在室温下显示出优良的超顺磁性，且结晶度高、分散性好、化学性质稳定同时表面易修饰．磁滞回线的模型分析说明该Fe3O4纳米晶粒是磁性单畴．该法制得的超顺磁Fe3O4纳米晶粒在生物和医学领域具有重要的应用价值．
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| 关 键 词： | polyol合成法 超小粒径 FE3O4 尺寸控制 |
Polyol Synthesis of Ultrasmall Fe3 O4 Magnetic Nanocrystals for Biomedical Applications |
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| LIU Hong-ling,WU Jun-hua.Polyol Synthesis of Ultrasmall Fe3 O4 Magnetic Nanocrystals for Biomedical Applications[J].Chemical Research,2008,19(3):9-13. |
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| Authors: | LIU Hong-ling WU Jun-hua |
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| Institution: | LIU Hong-ling, WU Jun-hua(1. College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, China ;2. Research Institute of Engineering and Technology, Korea University, Seoul 136-713, Korea) |
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| Abstract: | Sub -5nm ultrasmall nanosized Fe3O4 nanocrystals were synthesized by reduction of Fe(Ⅲ) acetylacetonate in the presence of polyvinylpyrrolidone(PVP) polymer as surfactant in one-pot polyol process.The particle size was tailored by the amounts of the precursor.The nanocrystals were investigated by XRD,TEM/HRTEM and VSM/SQUID.It is found that the nanocrystals have high crystallinity with distinct lattices,while the magnetic measurements revealed their well-defined superparamagnetic behavior at room temperature.Model analysis demonstrates that the magnetite nanocrystals exist in magnetic monodomains.Such PVP-coated Fe3O4 nanocrystals with tunable dimension and thus magnetic properties are promising for biomedical applications. |
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| Keywords: | polyol synthesis ultrasmall size Fe_3O_4 size control |
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