Upconversion Luminescence and Magnetic Turning of NaLuF4:Yb3+/Tm3+/Gd3+ Nanoparticles and Their Application for Detecting Acriflavine

<div>Relationships between the upconversion emissions of NaLuF4:20%Yb3+/0.5%Tm3+/20%Gd3+ nanocrystals and the pump power density. (a) UC emission spectrum at different excitation powers; (b) log-log plot of the UC emission intensity versus the pump power density.</div>

Journal of Nanomaterials

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Figure 4

Figure 4: Upconversion Luminescence and Magnetic Turning of NaLuF4:Yb3+/Tm3+/Gd3+ Nanoparticles and Their Application for Detecting Acriflavine