Figure 4

(a) FTIR spectra of FN-CDs and Z-FN-CDs with wave numbers corresponding to specific functional groups and associated bond stretching/vibrations; (b) X-ray diffractogram of FN-CDs, (c) Z-FN-CDs depicting prominent peaks characteristic for carbon dots with markings of 2θ, hkl indices and d-spacing as obtained from Match 4 software.