4.6 Article

Aqueous Manganese-Doped Core/Shell CdTe/ZnS Quantum Dots with Strong Fluorescence and High Relaxivity

Journal

JOURNAL OF PHYSICAL CHEMISTRY C
Volume 117, Issue 36, Pages 18752-18761

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/jp406342m

Keywords

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Funding

  1. National Basic Research Program of China [2011CB935800]
  2. National Nature Science Foundation of China [21203210, 81090271, 21021003]
  3. Research Grant Council of Hong Kong S.A.R. [T23-713/11]

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Core/shell CdTe/ZnS colloidal quantum dots with varying dopant levels (4.7-9.7%) of paramagnetic manganese ions spatially distributed within the thin ZnS shell are synthesized by the aqueous approach. They exhibit both strong fluorescence originating from the CdTe core (up to 45% room temperature emission quantum yield) and high ionic relaxivity in the range of 10.7-5.4 mM(-1) s(-1), which render them promising dual fluorescent/paramagnetic probes.

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