Figure 2

Effect of reaction time on the optical properties of C-CNDs: (A) UV-Vis absorption spectra; (B) Absorbance at six selected wavelengths as a function of reaction time; (C) PL emission spectra for different reaction times under excitation at 340 nm (OD 0.1), the inset is the PL Intensity as a function of reaction time; and (D) their corresponding normalized PL emission spectra.