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

Figure 6

(a) Fluorescence intensities (F/F₀) in the presence of 100 μM concentrations of various metal ions before (blue bars) and after (red bars) mixing with 100 μM Hg²⁺. (b) Fluorescence spectra of the CQD system in the presence of different concentrations of Hg²⁺ (excited at 380 nm). Inset: the dependence of F₀/F on concentration (0.500–20.0 μM). In (a), (A) blank; (B) Cr³⁺; (C) Cd²⁺; (D) Sr²⁺; (E) Al³⁺; (F) Mg²⁺; (G) Zn²⁺; (H) Ca²⁺; (I) K⁺; (J) Ba²⁺; (K) Na⁺; (L) Li⁺; (M) Co²⁺; (N) Ni²⁺; (O) Mn²⁺; (P) Ag⁺; (Q) Rb⁺; (R) Pb²⁺; (S) Fe³⁺; (T) Cu²⁺; (U) Fe²⁺; (V) Hg²⁺.

(a)

(b)