Fig. 7From: Multicolor Emitting N-Doped Carbon Dots Derived from Ascorbic Acid and Phenylenediamine PrecursorsThe normalized UV–Vis absorption spectra, PL excitation, and PL emission spectra of the a Am-CDs, c Ao-CDs, and e Ap-CDs. The normalized PL emission spectra of the b Am-CDs, d Ao-CDs, and f Ap-CDs at different excitation wavelengthsBack to article page