New Observations on Concentration‐Regulated Carbon Dots

Carbon dots have many new and interesting phenomena the concentration-dependent luminescence wavelength is an intriguing one. Luminescent carbon recently gained interest due to their such as its peak emission. While there been reports discussions on this phenomenon, mechanism continues be poorly understood. Herein, observations nitrogen–sulfur codoping (NSCDs) diluted at different concentrations show that high concentration of G-NSCDs (0.2 mg mL−1) emits green fluorescence while low B-NSCDs (0.01 blue fluorescence. It found dot size changes with particle concentration: about 37 nm in only 1.8 size. Therefore, it clearly demonstrated emission related These behaviors open a door for exploration materials novel potential.