Antibacterial activity of Cd-doped ZnO nanoparticles against Gram- positive and GRAM-NEGATIVE bacteria

The antimicrobial activity of Cd doped ZnO nanoparticles against gram-positiveand gram-negative bacteria are discuss in this paper. The effects of particle size and concentration of Cd doped ZnO nanoparticles for antibacterial activity is studied using bacteriological test such as disc and well diffusion agar methods.  Cd doped ZnO nanoparticle for antimicrobial activities is prepared via Sol-gel process. The crystalline structure, morphology and size of nanoparticles were characterized by transmission electron microscopy (TEM), X-ray diffraction spectra (XRD). Echerichia coli (E. coli), salmonella thiphy, pseudomonas fluorescence, proteus sp. Kelbsielia phemonia and Candida albicans were used as test microorganisms.

 Key-words: Nanoparticle, Cd doped ZnO, Gram-positive and Gram-negative, Transmission Electron Microscopy (TEM), X-ray Diffraction Spectra (XRD).