Abstract
Uniform ytterbium ion and erbium ion codoped gadolinium oxyfluoride (GdOF: Yb3+, Er3+) hollow nanospheres of 100-nm diameter were synthesized via the nanoscale Kirkendall approach, using colloidal nanospheres of ytterbium ion and erbium ion codoped gadolinium hydroxide [Gd(OH)3: Yb3+, Er3+] as sacrificial templates and titanium tetrafluoride as fluorine source under hydrothermal condition. The shell thickness of the as-synthesized GdOF: Yb3+, Er3+ hollow nanospheres can be facilely tuned from 31 to 13 nm by controlling reaction temperature and reaction time. The upconversion emission color could be adjusted from red to yellow to green when the host lattices variedfrom gadolinium (III) oxide to gadolinium oxyfluoride to gadolinium fluoride. Furthermore, the formation mechanism of the hollow GdOF: Yb3+, Er3+ nanospheres was found to depend on the fluorine source.
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Acknowledgments
The authors are thankful to the National Natural Science Foundation of China (Grant Nos. 20971051 and 10704073). We are very grateful to Prof. Jihong Yu for her helpful discussion and structural characterization. We are also grateful to Prof. Junqi Sun for his helpful discussion.
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Wang, Y., Liu, T., Wang, X. et al. Controlled synthesis of ytterbium ion and erbium ion codoped gadolinium oxyfluoride hollow nanosphere with upconversion luminescence property. Journal of Materials Research 28, 848–855 (2013). https://doi.org/10.1557/jmr.2013.12
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DOI: https://doi.org/10.1557/jmr.2013.12