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Zinc Oxide Nanoparticles—Synthesis, Characterization and Antibacterial Activity

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The ever increasing demand for seafood has lead aquaculture farmers to resort to intensive culture practices leading to stress of the animals and enhanced susceptibility to diseases. Vibriosis is one of the most prevalent bacterial diseases. Antibacterial activity of zinc oxide nanoparticles was tested in this study. Zinc oxide nanoparticles were synthesised by chemical precipitation method using Zinc acetate and varying concentrations (0.1%, 0.5%, 1%) of soluble starch and compared with the commercial ZnO nanoparticles for the inhibition of V. anguillarum pathogenic bacteria in aquaculture environment. The synthesized ZnO nanoparticles were confirmed using X-ray Diffraction analysis and the average size of the particles was 50 nm. Field Emission-Scanning Electron Microscopy images showed hexagonal morphology of the synthesised nano-ZnO. Flourescence Transform Infrared Spectroscopy analysis confirmed binding of starch to nano-ZnO. Energy dispersive X-ray analysis determined the elemental composition of nano-ZnO and Ultraviolet-Visible spectroscopy analysis revealed significant blue shift and ascertained the stability of the particles. Synthesized ZnO nanoparticles had higher bactericidal activity than commercial. Antibacterial assay revealed that nano-ZnO synthesised using 0.5% starch had the most efficient antibacterial activity against V. anguillarum with MIC of 30 μg/ml and MBC of 40 μg/ml and zone of inhibition of 15 mm. SEM image of V. anguillarum treated with and without ZnO nanoparticles confirmed the bacterial cell damage by ZnO nanoparticles. The results concluded that nano-ZnO is an effective bactericidal agent on V. anguillarum and can be used in aquaculture to effectively combat bacterial diseases.
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Keywords: Antibacterial Activity; Minimum Bactericidal Concentration; Minimum Inhibitory Concentration; V. anguillarum; ZnO Nanoparticles

Document Type: Research Article

Affiliations: 1: Department of Nano Science and Technology, Anna University, Chennai 25, India 2: Central Institute of Brackishwater Aquaculture, ICAR, Chennai 28, India

Publication date: August 1, 2017

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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