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. 2017 Jul 19;7:5849. doi: 10.1038/s41598-017-06356-z

Figure 3.

Figure 3

Fluorescence spectra and image of N-CDs in the presence of different composition (a) mere N-CDs; (b) in the presence of 5 μM Cu2+; (c) in the presence of 5 μM Cu2+ and 50 μM PPi; (d) in the presence of 5 μM Cu2+, 50 μM PPi and 1 U/mL ALP.