Fig. 4
From: A comprehensive review on the detection of latent fingermarks using carbon dots
Latent fingermark images based on N-CD’s nanoparticles on tested surfaces of (A) a metal tweezers and (B) a regular plastic PET bag, (C) HRTEM, (D) UV absorbance and emission spectra of N-CD’s. (E) Estimated emission contributions of N-CQDs nanoparticles at 411 (green), 450 (pink), and 495 (blue). Emission spectra (black) and estimated emission spectra (red) of N-CQDs under excitation 350 nm (Milenkovic et al. 2019) (Carbon 144, 2019, 791-797 with permission from Elsevier)