Engineered nanoparticles (ENPs) have been the focus of research on semiconductor oxide antibacterial activity over the last several decades. A modified well diffusion technique was used to test the antibacterial activity of modified ZnO (Gram-positive) and TiO2 (Gram-negative) against Bacillus brevis (Gram-positive) and E. coli (Gram-negative). Nanoparticles made of Ag-TiO2 were shown to be most effective in killing Gram-positive and Negative bacteria. ZnO, Eu2O3, ZnO, DyVO4-ZnO, GdVO4-ZnO,GdVO4-ZnO and HoVO4-ZnO were discovered to have substantial antibacterial properties.

Engineered nanoparticles (ENPs), Bacillus brevis, E. coli, Antibacterial activity.