The properties of ZnO nanoparticles prepared by PLAL technique and its effect on gram-negative and gram-positive bacteria

The Nd: YAG laser was pulsed at 400 and 500 mJ/pulse to create ZnO NPs using the laser ablation technique PLAL in D water. UV-VIS spectrophotometer and XRD were used to examine the optical and structural characteristics. The field emission scanning electron microscope (FESEM) analysis demonstrated that small agglomerated particles covered the larger particles, and the XRD analysis confirmed the crystal structure to be hexagonal. The estimated direct energy band gap values were 3.47eV and 3.4eV for 400 and 500mj/pulse of laser energy, respectively. This work examined the antibacterial activity of zinc oxide nanoparticles (ZnO NPs), showing that ZnO NPs had a strong antibacterial potential against both gram-positive and gram-negative bacteria.