【摘要】 利用反相微乳法,以巯基乙酸修饰的水溶性CdTe量子点为核,包覆SiO2,制备得到核壳型CdTe@SiO2荧光纳米复合粒子.用紫外-可见(UV-vis)分光光度计,荧光(PL)分光光度计,红外(FT-IR)光谱仪,透射电子显微镜(TEM)等分析测试手段,对得到的荧光纳米复合粒子的性能进行表征,结果表明:得到的CdTe@SiO2纳米复合粒子是核壳型结构,由SiO2壳层包覆多个量子点,其大小均匀,水溶性好,有效地提高了量子点的稳定性,大大增强了其抗光漂白性能,为该材料的进一步生物应用打下了良好的基础.更多还原

【Abstract】 CdTe@SiO2 core/shell luminescent composite nanoparticles were synthesized by the method of reverse microemulsion to coat SiO2 on water-soluble CdTe QD (quantum dot) cores. And the properties of the as-prepared nanoparticles were characterized by different ways including ultraviolet spectra (UV-vis), fluorescence spectra (FL), FT-IR spectra, and transmission electron microscopy (TEM). The results indi- cated that the as-prepared nanoparticles had a core/shell structure in which multi-QDs were encapsuled in a single composite nanoparticle. Moreover, the homogeneous nonoparticles had excellent water solubility as well as improved stability and photobleaching resistance. The approach introduced in this paper lays a solid foundation for the biological applications of the nanoparticles.更多还原