Synthesis and Characterization of Zinc Oxide Nanoparticles for Antibacterial Applications
Pages 205-210
S. Naseem Shah, S. Imran Ali, S. Rizwan Ali, M. Naeem, Yasmeen Bibi, S. Rehan Ali, S. Masood Raza, Yousuf Khan and Sikander Khan Sherwani
DOI: http://dx.doi.org/10.6000/1927-5129.2016.12.31
Published: 28 April 2016

Abstract: ZnO nanoparticles are synthesized for antibacterial applications by a simple co-precipitation method. X-ray diffraction (XRD) reveals that the synthesized ZnO has hexagonal crystal structure with mean crystallite size of 29 nm. Scanning electron microscopy (SEM) and Energy dispersive x-ray spectroscopy (EDX) shows pure ZnO with uniform morphology. UV–VIS absorption spectroscopy yield an absorption edge in the range 300-400 nm which corresponds to a band gap energy of 3.50 eV. Antibacterial activity of ZnO nanoparticles is tested against gram positive and gram negative bacteria by using agar-well method. These ZnO nanoparticles are found to be strongly antimicrobial as they effectively prevent the growth of many test microorganisms with a small minimum inhibitory concentrations (MIC) ~ 80 – 280 µg/ml.