Recently, carbon quantum dots (CQDs) have become a very valuable material that exhibits excellent properties, such as electrical, optical, and antimicrobial. The shape and high active sites on their surface (hydroxyl, carbonyl, and carboxyl groups) are the response to CDs solubility, biocompatibility, and bio-activity [1] also these groups are causes of CDs surface charges. death bacteria via the interaction of charged CDs with bacteria, therefor electrostatic interaction is an important factor in the control of bacteria growth[2]. metal ions can be doping to the CDs that can exchange electrons with the CDs matrix, leading to simplified change electrons which can be the cause of improving the deterrence bacterias property of CDs[3]. In this work, by the hydrothermal method synthesized nitrogen-carbon quantum dots and zinc-doped nitrogen-carbons quantum dots (N-CQDs and Zn/N-CQDs) [4]. The N-CQDs and Zn/N-CQDs were characterized by EDX, UVVis, FT-IR, and PL techniques. also, They were evaluated for their bactericidal activity against representative Gram-negative and Gram-positive bacterial strains. All of the mentioned techniques confirm the successful synthesis of these quantum dots. According to the findings and comparison average halo zone of the anti-bactericidal activity of the prepared particles shows that doping of Zn improved the inhibitory effect against bacteria. Carbon quantum dots, Antibacterial, Doping
