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Issue 14, 2015
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Highly bright multicolour emission through energy migration in core/shell nanotubes

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Abstract

This paper describes a simple and environmentally-friendly approach that allowed for the facile synthesis of a gadolinium-based core/shell/shell nanotube structure with a set of lanthanide ions incorporated into separated layers. In addition, by the rational design of a core/shell structure we systematically investigated the luminescence properties of different lanthanide ions in NaGdF4 host, and efficient down-conversion emission can be realized through gadolinium sublattice-mediated energy migration. The Gd3+ ions play an intermediate role in this process. By changing the doped lanthanide ions, we generated multicolour emissions from the luminescent Ln3+ centers via energy transfer of Ce3+→Gd3+→Ln3+ and Ce3+→Ln3+ (Ln = Eu, Tb, Dy and Sm) in separated layers. Due to the strong absorption of ultraviolet (UV) irradiation by Ce3+ ions, the luminescence efficiency could be enhanced after doping Ce3+ ions in the shell. In NaGdF4:5% Eu3+@NaGdF4@NaGdF4:5% Ce3+ core/shell/shell nanotubes, with increasing the NaGdF4 interlayer thickness, a gradual decrease in emission intensity was observed for the Eu3+ activator.

Graphical abstract: Highly bright multicolour emission through energy migration in core/shell nanotubes

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Supplementary files

Article information


Submitted
09 Feb 2015
Accepted
28 Feb 2015
First published
02 Mar 2015

Dalton Trans., 2015,44, 6645-6654
Article type
Paper
Author version available

Highly bright multicolour emission through energy migration in core/shell nanotubes

L. Liu, N. Zhang, Z. Leng, Y. Liang, R. Li, L. Zou and S. Gan, Dalton Trans., 2015, 44, 6645
DOI: 10.1039/C5DT00581G

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