“…Among these biosynthesized metal oxide, zinc oxide nanoparticles have been synthesized using leaf extract of aloe barbadensis, Abutilon indicum, Melia azedarach, Indigofera tinctoria, bacterial and fungus [19][20][21][22]. Recently, zinc oxide nanoparticles have been green synthesized using: seed extracts of Nigella sativa [23], leaf extract of Psidium gujava [24], extract of Daucus carota [25], plant extract of Monsonia burkeana [26], leaf extract of Mangifera indica [27], Aspergillus terreus [28] and Halomonas elongate [29]. The antibacterial efficiency of zinc oxide nanoparticles is directly related to its size, shape, surface to volume ratio and number of oxygen vacancy sites [30,31] Although biosynthesis of zinc oxide has been reported, the potential of plant extracts as biological materials for the synthesis of nanoparticles is yet to be fully explored.…”