“…The chemical materials of carbon compounds having the size smaller than 10 nm are known as carbon dots (C-dots). − These materials have special properties including chemiluminescence, photoluminescence, photoinduced electron transfer, and electrochemical luminescence. , C-dots find potential applications in bioimaging, , biosensing, , chemical sensing, and biomedicine . C-dots are the nanomaterials considered as potential candidates in the application of bioimaging, both in vitro and in vivo, and for diagnosis purposes, due to their unique fluorescent nature and having excellent biocompatibility, less cytotoxicity, and better solubility in water. − In this work, C-dots were synthesized from citric acid (CA) and o -phenylenediamine ( o -OPD).…”