ITO is typically possesses better conductivity than AZO (aluminium doped zinc oxide), which means that ITO film is more conductive than AZO for a given thickness. They show a strong agglomeration tendency and are prone to dissolving meaning that in addition to the actual nanoparticles there are always dissolved zinc ions present in aqueous solution. Nanoparticles are particles are typically less than 100 nanometers in diameter or 0.1 microns. To reduce the opaque appearance of zinc oxide, many sunscreen companies are making the particle smaller through a process referred to as “micronizing” to produce nanosized zinc particles. Nanotechnology is the most innovative field of 21st century. Zinc oxide nanoparticles are positively charged and belong to the group of soluble nanoparticles. presence of magnesium into the zinc oxide structure. Zinc oxide nanoparticles are toxic to mammalian cells grown under laboratory conditions but their effects on passing through food chains is unknown. It is worth noting that mixed metal oxide nanoparticles of zinc and magnesium lead to around a 30 % higher crosslink degree than the one obtained with standard zinc oxide. Bulk zinc oxide is white, but nanoparticulate zinc oxide is invisible on the skin. Recent years have witnessed a dynamic development of nanotechnology. Thus, ZnO in nanoscale has shown antimicrobial … ZnO is currently listed as a generally recognized as safe (GRAS) material by the Food and Drug Administration and is used as food additive. Extensive research is going on for commercializing nanoproducts throughout the world. The physical, chemical, and biological methods for the synthesis of zinc oxide nanoparticles are considered; their advantages and disadvantages are analyzed. Nevertheless, the crosslink degree achieved is higher than those obtained with zinc oxide nanoparticles. The advent of nanotechnology has led the development of materials with new properties for use as antimicrobial agents. Due to their unique properties, nanoparticles have gained considerable importance compared to bulk counterparts. e chemical synthesis methods of ZnO NPs like chemi-cal precipitation, hydrothermal method, pyrolysis, chemical vapour deposition, and so forth result in the presence of ... Zinc Oxide Nanoparticles. Zinc oxide (ZnO) is an inorganic compound widely used in everyday applications. The unique optical and antibacterial properties of zinc oxide nanoparticles and the relevant areas of their practical … Zinc oxide blocks ultraviolet light, so is used in sunscreens. Despite the assumption that the microsized titanium dioxide (micro-TiO 2) is harmless to people and animals [58, 59], the issue of TiO 2 toxicity has been a research subject in many scientific centers. Disadvantages of Chemical Synthesis of Nanoparticles. The relationship between the method of synthesis and the properties of the systems obtained is shown. 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