Mercaptopropionic acid-capped Mn super(2+):ZnSe/ZnO quantum dots with both downconversion and upconversion emissions for bioimaging applications

Doped quantum dots (d-dots) can serve as fluorescent biosensors and biolabels for biological applications. Our study describes a synthesis of mercaptopropionic acid (MPA)-capped Mn super(2+):ZnSe/ZnO d-dots through a facile, cost-efficient hydrothermal route. The as-prepared water-soluble d-dots exh...

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Bibliographic Details
Published inNanoscale Vol. 6; no. 21; pp. 12345 - 12349
Main Authors Zhao, Bingxia, Yao, Yulian, Yang, Kai, Rong, Pengfei, Huang, Peng, Sun, Kang, An, Xiao, Li, Zhiming, Chen, Xiaoyuan, Li, Wanwan
Format Journal Article
LanguageEnglish
Published 01.10.2014
Subjects
Emission
Gain
Nanostructure
Photoluminescence
Quantum dots
Synthesis
Upconversion
Zinc oxide
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Summary:Doped quantum dots (d-dots) can serve as fluorescent biosensors and biolabels for biological applications. Our study describes a synthesis of mercaptopropionic acid (MPA)-capped Mn super(2+):ZnSe/ZnO d-dots through a facile, cost-efficient hydrothermal route. The as-prepared water-soluble d-dots exhibit strong emission at ca. 580 nm, with a photoluminescence quantum yield (PLQY) as high as 31%, which is the highest value reported to date for such particles prepared viaan aqueous route. They also exhibit upconversion emission when excited at 800 nm. With an overall diameter of around 6.7 nm, the d-dots could gain access to the cell nucleus without any surface decoration, demonstrating their promising broad applications as fluorescent labels.
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ISSN:2040-3364
2040-3372
DOI:10.1039/c4nr03490b