The Application of Green-Synthesis-Derived Carbon Quantum Dots to Bioimaging and the Analysis of Mercury(II)

Figure 4

(a) UV-Vis absorption and photoluminescence spectra of CQDs. Inset: images of the N-CD aqueous solution in sunlight (left) and ultraviolet radiation (right). (b) Fluorescence emission spectra of the CQDs excited at various wavelengths. (c) The effect of pH on the fluorescence intensity of the CQDs excited at 380 nm. (d) The fluorescence decay curve of CQDs.

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