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Merck

Emission color tuning of core/shell upconversion nanoparticles through modulation of laser power or temperature.

Nanoscale (2017-08-15)
Qiyue Shao, Gongtuo Zhang, Lilai Ouyang, Yanqing Hu, Yan Dong, Jianqing Jiang
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Upconversion nanoparticles (UCNPs) are an excellent choice to construct security features against counterfeiting, owing to their unique NIR-to-VIS upconversion luminescence (UCL) characteristics. However, the application of upconversion materials is limited, due to their single and invariant emission colors. Herein, the temperature-dependent UCL properties of NaGdF

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