Aqueous synthesis of highly stable CdTe/ZnS Core/Shell quantum dots for bioimaging.
Aqueous synthesis of highly stable CdTe/ZnS Core/Shell quantum dots for bioimaging.
复制标题
DOI：
10.1002/bio.3193
复制
发表时间：
2017-05
期刊：
影响因子：
--
通讯作者：
D. Saikia;S. Chakravarty;N. S. Sarma;S. Bhattacharjee;P. Datta;N. C. Adhikary
中科院分区：
文献类型：
--
作者：
D. Saikia;S. Chakravarty;N. S. Sarma;S. Bhattacharjee;P. Datta;N. C. Adhikary
本文报道了巯基丁二酸（MSA）修饰的CdTe/ZnS（亚碲酸镉/硫化锌）核壳型量子点的合成、表征及其生物学应用。使用简单的一锅水溶液法合成CS量子点。发现合成的CdTe/ZnS CS量子点在制备后100天仍表现出优异的稳定性，并且与仅CdTe量子点的近12%相比，还显示出约50%的更好的光致发光量子产率（PLQY）。通过高分辨透射电子显微镜（HR-TEM）、傅里叶变换红外光谱（FTIR）和X射线衍射（XRD）分析证实了CdTe/ZnS CS的形成。进一步将我们的研究扩展到E.结果表明，CdTe/ZnS CS量子点的荧光强度明显优于CdTe量子点。
In this work, we report the synthesis, characterization and biological application of highly stable CdTe/ZnS (cadmium tellurite/zinc sulphide) Core/Shell (CS) quantum dots (QDs) capped with mercaptosuccinic acid (MSA). The CS QDs were synthesized using a simple one-pot aqueous method. The synthesized CdTe/ZnS CS QDs were found to exhibit excellent stability even 100 days after preparation and also showed better photoluminescence quantum yield (PLQY) of about 50% compared with that of only CdTe QDs which was nearly 12%. The formation of the CdTe/ZnS CS was confirmed by high-resolution transmission electron microscopy (HR-TEM), and Fourier transform infra-red (FTIR) and X-ray diffraction (XRD) analyses. Further, on extending our study towards bioimaging of E. coli cells using the QDs samples, we found that CdTe/ZnS CS QDs showed better results compared with CdTe QDs.