Document Type : Original Article
Authors
1 University of Tabriz
2 Faculty of Physics- University of Tabriz- Tabriz- Iran
Abstract
One of the food preservation methods is the use of environmentally friendly edible coatings. In this research, a film containing nanoparticles biosynthesized by cold atmospheric pressure direct current plasma was used to cover the plum. The nanoparticles were synthesized in an H-shaped reactor containing a mixture of silver nitrate and basil leaf extract in the form of plasma interaction with the liquid surface. By applying argon plasma to the liquid surface and optimizing the plasma application time and the rate of used materials, silver nanoparticles were obtained under a rapid synthesis process. The electron temperature and density of plasma were measured as 1keV and 5.011 x 1015cm-3, respectively. Synthesized nanoparticles in the solution were mixed with agar-agar powder and glycerol in order to prepare the film. The results of ultraviolet-visible spectroscopy show that the synthesized nanoparticles are silver. Also, the experimental results obtained from the analysis of scanning electron microscope images show that the synthesized nanoparticles are below 100 nm with spherical and quasi-spherical morphology. The results of time effect of film on the fruits at 45 days shows that the fruit with 1min coating had a longer shelf life than other fruits in the period of 23 days.
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