Detection of Melamine Based on the Fluorescence Changes of Nitrogen-Doped Carbon Dots

<div>(a) The fluorescence emission spectra of the mixed solutions of mercury nitrate and NCDs with different concentrations (<i>λ</i><sub>ex</sub> = 370 nm). Inset of (a) shows the graph of the fluorescence peak intensity changing with the concentration of Hg<sup>2+</sup>. (b) The absorption spectra of mixed solutions of different concentrations of mercury nitrate and NCDs.</div>

Journal of Spectroscopy

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Figure 2

Figure 2: Detection of Melamine Based on the Fluorescence Changes of Nitrogen-Doped Carbon Dots 