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Nanomaterials 2013, 3(4), 583-591; doi:10.3390/nano3040583

Tuning NaYF4 Nanoparticles through Alkaline Earth Doping

1 Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong 2 City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China
* Author to whom correspondence should be addressed.
Received: 10 October 2013 / Revised: 20 October 2013 / Accepted: 21 October 2013 / Published: 24 October 2013
(This article belongs to the Special Issue Current Trends in Up-Converting Nanoparticles)
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Phase and size of lanthanide-doped nanoparticles are the most important characteristics that dictate optical properties of these nanoparticles and affect their technological applications. Herein, we present a systematic study to examine the effect of alkaline earth doping on the formation of NaYF4 upconversion nanoparticles. We show that alkaline earth doping has a dual function of tuning particle size of hexagonal phase NaYF4 nanoparticles and stabilizing cubic phase NaYF4 nanoparticles depending on composition and concentration of the dopant ions. The study described here represents a facile and general strategy to tuning the properties of NaYF4 upconversion nanoparticles.
Keywords: impurity doping; nanoparticles; phase transformation; upconversion impurity doping; nanoparticles; phase transformation; upconversion
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Chen, X.; Peng, D.; Wang, F. Tuning NaYF4 Nanoparticles through Alkaline Earth Doping. Nanomaterials 2013, 3, 583-591.

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