Abstract
AbstractRecently, nitrogen rich carbon quantum dots gaining considerable attention due to their extraordinary optoelectronic properties, specifically the enhancement in quantum efficiency of photoluminescence emission. Here the synthesis of multicolor emission of nitrogen rich carbon quantum dots from silk sericin is presented. These quantum dots exhibit blue, green, yellow, and orange emissions with a quantum yield close to 67%, 38%, 16%, and 9.6%, respectively, due to variation in carbonization temperature. The detailed characterization studies show that the multicolor emission of carbon quantum dots is due to both quantum confinement of particles and surface defects generated by surface oxidation. Moreover, these nanoparticles are photostable, biocompatible, non‐toxic, and water soluble, and hence can be the promising materials for optoelectronic devices, bioimaging, biosensing, etc.
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