Synthesis and Study of Structural Properties of Calcium Oxide Nanoparticles Produced by Laser-Induced Plasma and its Effect on Antibacterial Activity

A LIBS technique was used to investigate the antibacterial activity of calcium oxide nanoparticles (CaO NPs). CaO NPs were prepared using a Q-switched Nd: YAG pulsed laser with fundamental wavelength 1064 nm at different energies (400-600 mJ) and constant frequency (6 Hz). powder sample after being pressed into disc diameter 1 cm. Analyzing X-ray diffraction (XRD) showed crystalline structure NPs, size 30.99±2 34.20±2.2 for energy 500 600 mJ. (FE-SEM) reveal topography produced results homogenous compact dense surface formation like flakes, cubes, tubes. Atomic force microscopy (AFM) has shown that nanoscale had coordinated structures. The also revealed stabilizing zeta potential average (ZP) -18.3±1.6 mV in mJ -8.8±2.3 Different preparing resulted varying killing number bacteria Klebsiella pneumoniae Staphylococcus aureus bacteria. Complete bacterial inhibition or cell growth inactivation found when