N-Doped Carbon Dots Derived from Melamine and Triethanolamine for Selective Sensing of Fe³⁺ Ions

Figure 2

(a) UV-vis spectra of purified NCDs in methanol solution. (b) PL spectra of NCDs under various excitation wavelengths. (c) The effect of pH on fluorescence intensity of NCDs. All the experiments were carried out in a water medium.

(a)

(b)

(c)