Brassica oleracea Mediated Synthesis of Zinc Oxide Nanoparticles and its Antibacterial Activity against Pathogenic Bacteria

Abstract

Nano-sized materials are known to play important role in basic and applied sciences thus the metal and metal oxide nanoparticles have been intensively studied in the past decade [1,2]. The metal oxides particularly exhibit fascinating properties such as electronic, catalytic, magnetic and antimicrobial activity owing to their large surface area to volume ration due to a high fraction of atoms [3,4]. Zinc oxide nanoparticles have a wide band gap of 3.3 eV at room temperature and high excitation binding energy of 60 meV, which helps it to demonstrate outstanding catalytic, optical, photochemical and electronic properties [5,6]. Zinc oxide nanoparticles are known to possess unique UV filtering, antibacterial, antifungal properties also which leads to its extensive use in cosmetic and healthcare industries [7-9]. Previous studies suggest that the strong antibacterial activity of zinc oxide nanoparticles against a variety of pathogenic Gram-positive and Gram-negative bacteria attributed to its capacity of releasing Zn 2+ ion from ZnO complex and interruption of lipid bilayer integrity, ROS generation and subsequent damage to DNA and protein of the host cell [10,11]. Chemical and physical methods of nanoparticle synthesis have

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Maranta arundinacea root mediated zinc oxide nanoparticles and its enhanced antibacterial activity

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