采用水相法合成了Cu掺杂CdTe量子点，并用CdS壳层进行包覆，得到了Cu∶CdTe/CdS核壳结构量子点。采用荧光发射光谱(FL)、紫外可见吸收光谱(UV-Vis)、透射电镜(TEM)以及能谱仪(EDS)等手段对 CdTe量子点和Cu∶CdTe/CdS核壳量子点进行了表征。研究了不同 Cu 掺杂浓度、CdS壳层生长时间以及 Cd/硫脲物质的量比对Cu∶CdTe掺杂量子点光学性能的影响，并采用人成骨肉瘤细胞(MG-63细胞)对样品做了细胞毒性分析。研究结果表明：通过掺杂和包壳的步骤，合成的 Cu∶CdTe/CdS 核壳量子点在 CdTe 量子点的基础上实现了荧光发射红移，荧光强度提高，以及细胞毒性降低。
Cu-doped CdTe quantum dots (QDs)were prepared through water-phase synthesis and CdS shells were coated on these prepared QDs to form Cu∶CdTe/CdS core/shell quantum dots,which were then characterized by means of fluorescence emission spectroscopy (FL),UV-Visible absorption spectroscopy (UV-Vis),transmission electron microscopy (TEM)and energy dispersive spectroscopy (EDS).Moreover,the influence of Cu-doping concen-tration,CdS shell growth duration and molar ratio of Cd/thiourea on the optical properties of Cu∶CdTe doped quan-tum dots were studied.The cytotoxicity of the samples were detected by using human osteosarcoma cells (MG-63 cells).The results showed that compared with undoped CdTe quantum dots,the synthesized Cu∶CdTe/CdS core/shell quantum dots realized a redshift of fluorescence emission,an enhancement of fluorescence intensity and a decline of cell toxicity which can be attributed to Cu doping and CdS shell.
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