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Issue 9, 2014
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Synthesis of porous upconverting luminescence α-NaYF4:Ln3+ microspheres and their potential applications as carriers

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Abstract

The present work reports a self-sacrificing template strategy to synthesize porous α-NaYF4 microspheres via the reaction of as-prepared Y(OH)CO3·H2O@SiO2 with NH4F and NaNO3 solutions. XRD, SEM, TEM and N2 adsorption–desorption measurements were used to characterize the resulting product. The surface SiO2 shell was shown to play a vital role in size and shape control and porosity formation. A possible reaction mechanism was explored in terms of a surface-protected etching and ion-exchange reaction process. To explore their application potential, the storage and release behavior of Rhodamine 640 dye in the porous α-NaYF4 microspheres was investigated, showing a relatively high loading efficiency and a sustained release ratio. Under near-infrared (NIR) irradiation, porous α-NaYF4 microspheres doped with lanthanide ions showed typical upconverting luminescence characteristics that can convert NIR photons to ultraviolet/visible photons. The above features and properties indicate that our present porous upconverting luminescence particles are promising in biological applications as luminescence imaging agents and drug carriers.

Graphical abstract: Synthesis of porous upconverting luminescence α-NaYF4:Ln3+ microspheres and their potential applications as carriers

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Publication details

The article was received on 14 Nov 2013, accepted on 16 Dec 2013 and first published on 16 Dec 2013


Article type: Paper
DOI: 10.1039/C3DT53213E
Citation: Dalton Trans., 2014,43, 3681-3690
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    Synthesis of porous upconverting luminescence α-NaYF4:Ln3+ microspheres and their potential applications as carriers

    C. Lv, W. Di, Z. Liu, K. Zheng and W. Qin, Dalton Trans., 2014, 43, 3681
    DOI: 10.1039/C3DT53213E

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