Abstract
The present was the first report on the synthesis of Carbon dots (CDs) using the acetone leaf extract of Cannabis sativa, an abundant weed plant as a sole carbon precursor. The obtained ~5 nm spherical CD particles (exhibiting 13% absolute quantum yield) were further employed to synthesize silver@CDs (Ag@CDs). CDs and Ag@CDs characterization revealed characteristic functional groups attributing to the aromatic, carboxylated and hydroxylated moieties. Ether and acetone leaf extracts of C. sativa exhibited strong antibacterial activity against dental microflora. Statistical analysis indicated 42 µg/mL as the significant MIC of Ag@CDs against Escherichia coli and Staphylococcus aureus (ρ < 0.0001). The results suggested weed abundance as an excellent natural carbon reserve and the biosynthesized Ag@CDs carry a great potential for the antibacterial application.
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