Fig. 4
From: Advances and Challenges of Fluorescent Nanomaterials for Synthesis and Biomedical Applications
Schematic of structure and energy level alignments of nontreated CDs (left column) and CDs modified with S = O/C = O‐rich molecules (right column). The red (oxygen atom) and green double‐bonded balls represent the C = O/S = O‐rich molecule [81]