采用水相回流法制备出光谱可调的CdTe/CdS量子点，分别用透射电子显微镜（TEM）、能谱色散仪（EDS）、荧光分光光度仪对其形貌性能进行表征。用氨基聚倍半硅氧烷（NH₂-POSS）功能化CdTe/CdS量子点使其带有正电荷，再与带负电荷的Fe₃O₄磁性纳米粒子进行静电自组装，最终制备出磁性荧光复合材料（Fe₃O₄-CdTe/CdS）。并对量子点与氨基聚倍半硅氧烷的质量比、量子点与Fe₃O₄的质量比以及三者不同的组装顺序进行优化。结果表明，当量子点与氨基聚倍半硅氧烷和Fe₃O₄的质量比分别为6：1和20：1、组装顺序为量子点-氨基聚倍半硅氧烷-Fe₃O₄时得到复合材料的性能最佳。

The spectral adjustable CdTe/CdS quantum dots are prepared by aqueous phase refluxing method.The prepared quantum dots are characterized by transmission electron microscopy (TEM),energy dispersive spectrometer (EDS) and fluorescence spectrophotometer.Amino-polysilsesquioxanes (NH₂-POSS) is used to functionalize CdTe/CdS quantum dots,making them bring with positive charges.Finally,magnetic fluorescent composites (Fe₃O₄-CdTe/CdS) are synthesized through electrostatic self-assembling the functionalized CdTe/CdS quantum dots with negatively charged Fe₃O₄ magnetic nanoparticles.The mass ratios of quantum dots to NH₂-POSS and quantum dots to Fe₃O₄ as well as the different assembly sequences among quantum dots,NH₂-POSS and Fe₃O₄ are optimized.The results show that when the mass ratio of quantum dots to NH₂-POSS is 6:1,that of quantum dots to Fe₃O₄ is 20:1,and the assembly order is quantum dot at first,then NH₂-POSS and finally Fe₃O₄,the composites will have the best performance.