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. 2019 Jul 14;16(14):2518. doi: 10.3390/ijerph16142518

Figure 5.

Figure 5

N-CQDs were used for the detection of Ag+ in aqueous solution. (a) Fluorescence intensity of N-CQDs at different concentrations of Ag+; (b) fluorescence quenching efficiency of N-CQDs at different concentrations of Ag+. In the figure, F0 is the fluorescence intensity of N-CQDs; F is the fluorescence intensity of N-CQDs when different concentrations of Ag+ are added; (F0 − F)/F0 is the fluorescence quenching efficiency of N-CQDs.