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Issue 38, 2012
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Lanthanide-doped ultrasmall yttrium fluoridenanoparticles with enhanced multicolor upconversion photoluminescence

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Abstract

Ultrasmall upconversion (UC) nanoparticles with efficient multicolor photoluminescence (PL) are quite desirable for high contrast in vitro and in vivo bioimaging. Here, we present a simple and reproducible thermolysis approach to synthesize 3.7 nm sized lanthanide-doped YF3 UC nanocrystals. The PL intensity of these ultrasmall nanoparticles was found to be about ten times brighter than that of 4.5 nm sized CaF2 counterparts, which were reported to be one of the smallest efficient upconversion nanoparticles. We also showed that the color output of these nanocrystals can all be simply modulated by adjusting the sensitizer Yb3+ concentration. Moreover, to further enhance the PL output, a one nm thick epitaxial layer was grown onto the YF3 nanocrystals. These lanthanide-doped ultrasmall upconversion YF3 nanocrystals with modulated and enhanced multicolor output are ideal for a variety of in vitro and in vivo biological imaging applications.

Graphical abstract: Lanthanide-doped ultrasmall yttrium fluoride nanoparticles with enhanced multicolor upconversion photoluminescence

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Supplementary files

Article information


Submitted
12 Apr 2012
Accepted
03 Jul 2012
First published
03 Jul 2012

J. Mater. Chem., 2012,22, 20190-20196
Article type
Paper

Lanthanide-doped ultrasmall yttrium fluoride nanoparticles with enhanced multicolor upconversion photoluminescence

G. Chen, H. Qiu, R. Fan, S. Hao, S. Tan, C. Yang and G. Han, J. Mater. Chem., 2012, 22, 20190
DOI: 10.1039/C2JM32298F

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