Tuning the Optical Properties of Silicon Quantum Dots via Surface Functionalization with Conjugated Aromatic Fluorophores.
Tuning the Optical Properties of Silicon Quantum Dots via Surface Functionalization with Conjugated Aromatic Fluorophores.
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DOI：
10.1038/s41598-018-21181-8
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发表时间：
2018-02-14
影响因子：
4.6
通讯作者：
Charpentier PA
中科院分区：
文献类型：
--
作者：
Abdelhameed M;Martir DR;Chen S;Xu WZ;Oyeneye OO;Chakrabarti S;Zysman-Colman E;Charpentier PA
硅量子点（SQDs）由于其优异的光学性能、低细胞毒性和易于表面改性而引起了人们的极大兴趣。量子点的大小和表面配体的类型对其光学性质有很大的影响，但人们对这一点的认识还很有限。在这里，我们报告的合成和光谱研究的三个家庭的未报告的SQDs功能化的共价连接到芳香族荧光团，9-乙烯基菲，1-乙烯基芘，和3-乙烯基苝。结果表明，制备的功能化SQDs具有高度可控的直径由HR-TEM，范围从1.7-2.1 nm。组装体的光物理测量为从荧光团到SQD核心的有效能量转移提供了明确的证据。在这些组装体中，可能的机制是F-奥斯特能量转移。作为光生能量转移过程的结果，SQD核的发射颜色可以被有效地调谐，并且其发射量子效率被提高。为了证明合成的SQD用于癌细胞生物成像的潜在应用，检查了水溶性的二萘嵌苯和芘封端的SQD用于HeLa细胞的荧光成像。SQD具有较低的细胞毒性
Silicon Quantum Dots (SQDs) have recently attracted great interest due to their excellent optical properties, low cytotoxicity, and ease of surface modification. The size of SQDs and type of ligand on their surface has a great influence on their optical properties which is still poorly understood. Here we report the synthesis and spectroscopic studies of three families of unreported SQDs functionalized by covalently linking to the aromatic fluorophores, 9-vinylphenanthrene, 1-vinylpyrene, and 3-vinylperylene. The results showed that the prepared functionalized SQDs had a highly-controlled diameter by HR-TEM, ranging from 1.7–2.1 nm. The photophysical measurements of the assemblies provided clear evidence for efficient energy transfer from the fluorophore to the SQD core. Fӧrster energy transfer is the likely mechanism in these assemblies. As a result of the photogenerated energy transfer process, the emission color of the SQD core could be efficiently tuned and its emission quantum efficiency enhanced. To demonstrate the potential application of the synthesized SQDs for bioimaging of cancer cells, the water-soluble perylene- and pyrene-capped SQDs were examined for fluorescent imaging of HeLa cells. The SQDs were shown to be of low cytotoxicity
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影响因子：
17.1
作者：
Dasog, Mita;Yang, Zhenyu;Regli, Sarah;Atkins, Tonya M.;Faramus, Angelique;Singh, Mani P.;Muthuswamy, Elayaraja;Kauzlarich, Susan M.;Tilley, Richard D.;Veinot, Jonathan G. C.
通讯作者：
Veinot, Jonathan G. C.
影响因子：
56.9
作者：
HEATH, JR
通讯作者：
HEATH, JR
影响因子：
6.7
作者：
Erogbogbo, Folarin;Chang, Ching-Wen;Prasad, Paras N.
通讯作者：
Prasad, Paras N.
影响因子：
--
作者：
MELHUISH, WH
通讯作者：
MELHUISH, WH
影响因子：
2.9
作者：
Benniston, AC;Chapman, GM;Mehrabi, M
通讯作者：
Mehrabi, M