Preparation and characterization of bio-compatible Fe₃O₄@Polydopamine spheres with core/shell nanostructure

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• 作者：Jingyu Si^a ; Hua Yang^b ; ^{yanghua_ah@ahau.edu.cn"" rel=""nofollow} ; ^{huayangahau@163.com"" rel=""nofollow}
• 关键词：A. Composite materials ; A. Magnetic materials ; B. Coatings ; A. Polymers
• 刊名：Materials Chemistry and Physics
• 出版年：2011
• 出版时间：15 August 2011
• 年：2011
• 卷：128
• 期：3
• 页码：519-524
• 全文大小：1132 K

文摘

Bio-compatible and superparamagnetic Fe₃O₄@Polydopamine nanocomposites with well-defined core/shell nanostructures have been successfully synthesized by using an in situ self-polymerization method. The size of the core/shell product can be controlled by varying the size of the central Fe₃O₄ core, and different thicknesses of the PDA shells are obtained by tuning the dopamine monomer concentration. The morphology, phase composition and crystallinity of the as-prepared nanocomposites have been characterized by transmission electron microscopy (TEM) and powder X-ray diffraction (XRD). The 5-dimethylthiazol-2-yl-2,5-diphenyl-tetrazolium bromide (MTT) cytotoxic analysis shows that the product is biocompatible, with a low toxicity. These unique core/shell materials would be applied in catalyst supports or drug delivery.