Fe_3O_4/PEI/Au@CdSe/CdS多功能复合材料的制备与表征  

Preparation and Characterization of Fe_3O_4/PEI/Au@CdSe/CdS Multifunctional Composite Materials

作　　者：周翔[1,2] 王秀玲[1,2] 刘勇健[1,2] 陈勇兵[1] 刘敏[1] 

机构地区：[1]苏州科技学院化学生物与材料工程学院,苏州215009 [2]江苏省环境功能材料重点实验室,苏州215009

出　　处：《无机化学学报》2015年第6期1165-1170,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.51103120)资助项目

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Cd Se/Cd S连接,成功制备了Fe3O4/PEI/Au@Cd Se/Cd S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40 nm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28.83 A·m2·kg-1,同时兼有优越的荧光性能和金纳米粒子的特性。Fe3O4nanoparticles 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. Cd Se/Cd S QDs was modified with thioglycolic acid, and connected to magnetic nanoparticles. Fe3O4/PEI/Au@Cd Se/Cd S 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.

关 键 词：磁性 AU纳米粒子 荧光 多功能材料 

分 类 号：O614.123[理学—无机化学] O614.811[理学—化学]