Titanium dioxide (TiO2) nanoparticles (NPs) colloidal that have been synthesized via Nd-YAG laser technique in pure distilled water. The produced NPs were characterized by UV-Vis absorption spectrophotometer and Transmission Electron Microscope (TEM). The surface Plasmon resonance of the colloidal determined by UV-Vis absorption spectra and the absorption peak located at 200nm. TEM exhibits that the size of NPs ranged between 10-80 nm. The antimicrobial activity was tested against Escherichia coli ATCC (gram negative bacteria) and Staphylococcus aureus ATCC 25923 (gram positive bacteria). Prepared TiO2 NPs exhibited inhibitory activity in both bacteria strains with best selectivity against gram-negative bacteria.

Titanium dioxide (TiO2) nanoparticles (NPs) colloidal that have been synthesized via Nd-YAG laser technique in pure distilled water. The produced NPs were characterized by UV-Vis absorption spectrophotometer and Transmission Electron Microscope (TEM). The surface Plasmon resonance of the colloi...