Impact of Aluminium on ZnO Thin Films for Antimicrobial Activity

Thin films of pure zinc oxide (ZnO) and aluminium (Al) doped ZnO were deposited by two step SILAR technique. Pure Al (1%, 3%, 5%) thin film’s structural, morphology optical properties analyzed. Diffraction peaks all the samples indexed to hexagonal Wurtizite structure. The crystallite size, lattice parameters, dislocation density microstrain calculated for prepared films. Morphology study using FESEM shows spherical shaped structure faced rod like UV-vis absorption spectrum was also studied. There is decrease in bandgap as doping ratio increases from 1% 5%. Photoluminescence studies confirmed that oxygen ion vacancy interstitial Zn+ present. maximum zone inhibition studied against Gram-negative (E. coli) Gram-positive (S. aureus) bacteria agar diffusion method. Significant antimicrobial results seen ZnO. Aluminium more activity over