Abstract

Carbon dots have emerged as extremely useful material in the recent era because of their excellent physicochemical properties,
extremely small size, economical synthesis, biocompatibility, and low toxicity levels as compared to other zero-dimensional
materials. Their method of synthesis involves both top-to-down and bottom-to-up approaches such as laser ablation, thermal
ablation, chemical oxidation, and sonochemical and electrochemical methods. However, the green synthesis of carbon dots
has grabbed much attention owing to its low cost and eco-friendly approach. Green synthesis of carbon dots is not only useful
for lowering the toxicity of synthesized nanoparticles but also helps in mitigating bio-waste that lands up in landfills without
undergoing the process of biodegradation. They have a wide variety of applications that include catalysis, biomedicines, sensing,
and imaging applications. In the present communication, the green synthesis of carbon dots has been highlighted along with their
applications in various fields.