OICC Press International Journal of Nano Dimension 2228-5059 5 6 2024 02 29 Synthesis and characterization of Cadmium Oxide nanoparticles for antimicrobial activity 10.7508/ijnd.2014.06.007 EN D. DurgaVijaykarthik PG and Research Centre of Physics, VHNSN College, Virudhunagar – 626001, Tamilnadu, India. 0000-0003-3858-4833 M. Kirithika Department of microbiology, VHNSN College, Virudhunagar – 626001, Tamilnadu, India. N. Prithivikumaran Nanoscience Research Lab, Department of Physics, VHNSN College, Virudhunagar 626001, Tamilnadu, India. N. Jeyakumaran Nanoscience Research Lab, Department of Physics, VHNSN College, Virudhunagar 626001, Tamilnadu, India. Journal Article 2024 02 29 Cadmium Oxide (CdO) nanoparticles were prepared by precipitation method using Cadmium acetate and ammonia solution. Presence of chemical species, were verified by Fourier Transform Infra Red (FTIR) Spectrum. From X-Ray Diffraction (XRD) spectrum the particle size, d-spacing value and structure of the nanoparticle were analysed. Size of the nanoparticles and the elemental composition were detected by using Scanning Electron Microscope (SEM) with Energy Dispersive X-Ray Analysis (EDAX). The optical band gap of CdO nanoparticles has been determined by using UltraViolet-Visible (UV-Vis) absorption spectroscopy. The antimicrobial activities of different concentration of the CdO nanoparticles were tested by treating E.coli cultures with CdO nanoparticles. Cadmium Oxide nanoparticles show effective antimicrobial activity. Different organisms were used to observe the zone of inhibition of CdO nanoparticles.