Multicolour synthesis in lanthanide-doped nanocrystals through cation exchange in water

Sanyang Han, Xian Qin, Zhongfu An, Yihan Zhu, Liangliang Liang, Yu Han (), Wei Huang () and Xiaogang Liu ()
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Sanyang Han: National University of Singapore
Xian Qin: Institute of Materials Research and Engineering, Agency for Science, Technology and Research
Zhongfu An: Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University
Yihan Zhu: Advanced Membrane and Porous Materials Center, King Abdullah University of Science and Technology
Liangliang Liang: National University of Singapore
Yu Han: Advanced Membrane and Porous Materials Center, King Abdullah University of Science and Technology
Wei Huang: Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University
Xiaogang Liu: National University of Singapore

Nature Communications, 2016, vol. 7, issue 1, 1-7

Abstract: Abstract Meeting the high demand for lanthanide-doped luminescent nanocrystals across a broad range of fields hinges upon the development of a robust synthetic protocol that provides rapid, just-in-time nanocrystal preparation. However, to date, almost all lanthanide-doped luminescent nanomaterials have relied on direct synthesis requiring stringent controls over crystal nucleation and growth at elevated temperatures. Here we demonstrate the use of a cation exchange strategy for expeditiously accessing large classes of such nanocrystals. By combining the process of cation exchange with energy migration, the luminescence properties of the nanocrystals can be easily tuned while preserving the size, morphology and crystal phase of the initial nanocrystal template. This post-synthesis strategy enables us to achieve upconversion luminescence in Ce3+ and Mn2+-activated hexagonal-phased nanocrystals, opening a gateway towards applications ranging from chemical sensing to anti-counterfeiting.

Date: 2016
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DOI: 10.1038/ncomms13059

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