Fig. 1From: Surface States Induced Photoluminescence Enhancement of Nitrogen-Doped Carbon Dots Via Post-Treatmentsa TEM and b HRTEM images and c FT-IR spectra of NCDs. High-resolution d C 1s, e N 1s, and f O 1s spectra of NCDs. The histogram of size distributions and HRTEM image of a single QD are shown in the inset at high magnification while the scale bar is 2 nmBack to article page