Abstract
This study introduces a novel hydrothermal green method for synthesized carbon quantum dots (CQDs) using dried powders of Citrus limetta peels as a carbon source. The synthesized CQDs were evaluated for their photothermal response, pH sensing under various conditions and biocompatibility through non-hemolytic activity. CQDs had low crystallinity and an average size of 3 nm, ranging from 1 to 6 nm. CQDs have biocompatible properties, which makes them suitable for developing pH sensors. The study also revealed that the temperature of CQDs increases up to 37 °C under laser light irradiation of 808 nm, which might have potential applications in the biomedical field.
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