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本实验采用一步法成功合成了PEG修饰的Fe_3O_4纳米球,其粒径约为200~400 nm。产物经过以下几种方法表征:X射线衍射(XRD),傅里叶红外光谱(FT-IR),透射电镜(TEM)和扫描电镜(SEM)。表征结果显示反应中加入PEG的浓度对生成产物的相组成和形貌有巨大的影响。PEG在反应中可以充当结构导向以及表面保护剂以阻止Fe_3O_4固体球被进一步氧化。此外,生成的Fe_3O_4因其较高的饱和磁化强度,作生物医药方面能得到很好的应用
In this experiment, PEG-modified Fe 3 O 4 nanospheres were successfully synthesized by one-step method and the particle size was about 200-400 nm. The product was characterized by the following methods: XRD, FT-IR, TEM and SEM. Characterization results show that the concentration of PEG added to the reaction has a huge impact on the phase composition and morphology of the product. PEG can act as a structure-directed and surface protective agent in the reaction to prevent the Fe 3 O 4 solid sphere from further oxidizing. In addition, the generated Fe 3 O 4 because of its high saturation magnetization, for biomedical applications can be very good