Red-Emissive Center Formation within Carbon Dots Based on Citric Acid and Formamide
Evgeniia A. Stepanidenko, Anna A. Vedernikova, Mikhail D. Miruschenko, Daler R. Dadadzhanov, Daniel Feferman, Bohan Zhang, Songnan Qu, Elena V. Ushakova
Abstract
The formation of red-emissive optical centers in carbon dots based on citric acid and formamide was investigated by varying the synthesis parameters with focus on finding optimal─necessary and sufficient─amount of precursors to decrease byproduct amount and to increase the chemical yield of red-emissive carbon dots. The emission is observed at 640 nm excited at 590 nm and quantum yield reaches up 19%. A high chemical yield of carbon dots of 26% was achieved at an optimal molar ratio of citric acid to formamide of 1:4.
Topics & Concepts
Citric acidFormamideCarbon fibersYield (engineering)Quantum yieldMolar ratioQuantum dotChemistryExcited statePhotochemistryMaterials scienceInorganic chemistryNuclear chemistryFluorescenceNanotechnologyOrganic chemistryCatalysisOpticsMetallurgyComposite numberPhysicsNuclear physicsComposite materialCarbon and Quantum Dots ApplicationsLuminescence and Fluorescent MaterialsOrganic Light-Emitting Diodes Research