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Issue 6, 2014
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Hydrothermal synthesis of ordered β-NaYF4 nanorod self-assemblies with multicolor up- and down-conversions

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Abstract

Ordered β-NaYF4 nanorod self-assemblies with controllable morphologies and tunable sizes have been successfully synthesized via a facile hydrothermal route. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), and photoluminescence (PL) spectra were used to characterize the samples. The influences of the molar ratio of sodium oleate (NaOA) to RE3+ and NaF to RE3+ (RE represents the total amount of Y3+ and the doped rare earth elements such as Eu3+, Tb3+, Sm3+, Yb3+, Er3+, Tm3+, and Ho3+) on the crystal morphology and size have been investigated in detail. It is found that NaOA and NaF have a dynamic effect by adjusting the growth rate of different facets under different experimental conditions, resulting in the formation of the anisotropic geometries of various β-NaYF4 crystals. The possible formation mechanism for products with diverse morphologies has been proposed. The luminescence properties and mechanisms for the doped β-NaYF4:Ln3+ (Ln = Eu, Tb, Sm, Yb/Er, Yb/Tm, and Yb/Ho) crystals were thoroughly analyzed. Multicolor emissions, including red, green, orange, and blue, can be achieved in ordered β-NaYF4:Ln3+ nanorod self-assemblies by simply changing the dopant species (Ln3+).

Graphical abstract: Hydrothermal synthesis of ordered β-NaYF4 nanorod self-assemblies with multicolor up- and down-conversions

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Supplementary files

Article information


Submitted
15 Sep 2013
Accepted
22 Nov 2013
First published
29 Nov 2013

CrystEngComm, 2014,16, 1163-1173
Article type
Paper

Hydrothermal synthesis of ordered β-NaYF4 nanorod self-assemblies with multicolor up- and down-conversions

M. Ding, C. Lu, Y. Song, Y. Ni and Z. Xu, CrystEngComm, 2014, 16, 1163
DOI: 10.1039/C3CE41860J

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