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Optical-magnetic bifunctional property and mechanistic insight on upconversion NaYF4: Yb, Ho, Tm@NaGdF4 with tunable nanodumbbell morphology

Abstract

The energy-upconversion of lanthanide-doped nanoparticles with a core-shell structure can be utilized to enhance and tune the optical properties and can generate multifunctionality in a single system. Herein, the core-shell nanoparticles NaYF4: Yb, Ho, Tm@ NaGdF4 were prepared by thermally decomposing lanthanide acetylacetonate precursors. Through modifying the mole ratio of the core and shell, nanodumbbell-shaped particles with different sizes and morphologies were precisely synthesized. The formation mechanism and heterogeneous epitaxial growth process of the nanodumbbell-shaped particles were studied. After coating the shell layer, the upconversion luminescence intensity, spectral purity and fluorescence lifetime were improved. Furthermore, the magnetic performance of the core-shell nanoparticles was characterized. The optical-magnetic bifunctional upconversion core-shell particles with programmable shape and multiple properties provide an ideal platform for the preparation of nanodumbbell-shaped particles and the promotion of upconversion materials for biomedical research.

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Publication details

The article was received on 25 Jul 2017, accepted on 05 Nov 2017 and first published on 07 Nov 2017


Article type: Paper
DOI: 10.1039/C7CP05011A
Citation: Phys. Chem. Chem. Phys., 2017, Accepted Manuscript
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    Optical-magnetic bifunctional property and mechanistic insight on upconversion NaYF4: Yb, Ho, Tm@NaGdF4 with tunable nanodumbbell morphology

    Z. Yu, H. Zhou, G. Zhou, J. Zhou, Y. Wu, X. Zhang, T. Wang, D. Huang, X. Wang and J. Hu, Phys. Chem. Chem. Phys., 2017, Accepted Manuscript , DOI: 10.1039/C7CP05011A

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