| Fe3O4/PEI/Au@CdSe/CdS多功能复合材料的制备与表征 | |
| Preparation and Characterization of Fe3O4/PEI/Au@CdSe/CdS Multifunctional Composite Materials | |
| 摘要: 以共沉淀法制备出Fe3O4纳米粒子,通过聚乙烯亚胺(PEI)修饰Fe3O4纳米粒子,再原位复合上Au纳米粒子,制得Fe3O4/PEI/Au纳米颗粒微球。再将Fe3O4/PEI/Au纳米颗粒与巯基乙酸修饰的量子点CdSe/CdS连接,成功制备了Fe3O4/PEI/Au@CdSe/CdS多功能复合微球。经过傅里叶变换红外光谱仪(FTIR)、荧光分光光度计、荧光显微镜、X射线衍射(XRD)、透射电子显微镜(TEM)及振动样品磁强计(VSM)的表征。结果表明:多功能复合微球的粒径在40nm左右,具有超顺磁性,剩磁,矫顽力近似等于零,饱和磁化强度为28.83A·m2·kg-1,同时兼有优越的荧光性能和金纳米粒子的特性。 | |
| 关键词: 磁性 Au纳米粒子 荧光 多功能材料 | |
| 基金项目: 国家自然科学基金(No.51103120)资助项目。 | |
| Abstract: Fe3O4 nanoparticles were prepared by coprecipitation, which were modified by polyethyleneimine(PEI). Au nanoparticles were composited in situ, and then the Fe3O4/PEI/Au microspheres were obtained. CdSe/CdS QDs was modified with thioglycolic acid, and connected to magnetic nanoparticles. Fe3O4/PEI/Au@CdSe/CdS multifunctional composite microspheres were prepared successfully. Fourier transform infrared spectroscopy (FTIR), Fluorescence spectrophotometer, Fluorescence microscopy, X-ray diffraction (XRD), Transmission electron microscopy (TEM) and Vibrating sample magnetometer (VSM) are used for characterizing. The results shows that: the multifunctional composite microspheres with the size about 40 nm were superparamagnetic and remanence; the coercivity is near zero; the saturated magnetization is 28.83 A·m2·kg-1. What's more, the microspheres have both superior fluorescence and gold nanoparticles' properties. | |
| Keywords: magnetic Au nanoparticles fluorescence multifunctional materials | |
| 投稿时间：2015-01-16 修订日期：2015-03-11 | |
| 摘要点击次数: 1902 | |
| 全文下载次数: 1890 | |
| 周翔,王秀玲,刘勇健,陈勇兵,刘敏.Fe3O4/PEI/Au@CdSe/CdS多功能复合材料的制备与表征[J].无机化学学报,2015,31(6):1165-1170. | |
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