Biosynthesis of silver nanoparticles using different genotypes of tall fescue (Festuca arundinacea Schreb.) extract

FATEMEH AMINI, HAMIDREZA DASTJERD

Abstract: In order to produce green synthesis of silver nanoparticles, the plant extract of 10 genotypes of tall fescue were used to reduce the silver ions present in the solution of 5M silver nitrate. This research was conducted in complete randomize design with 3 replications. The reaction was done at 70°C that the color of the extract changed from pale yellow to dark brown revealed the production of silver nanoparticles. The differences between genotypes extract were signifi cant for evaluated traits such as percent of carbohydrate and potential of reduction based of UV spectrophotometry. The results showed that genotype number 4 had the highest means for the evaluated traits. In this study, the formation of silver nanoparticles was confi rmed (by the presence of an absorption peak at 450 nm) using a spectrophotometer. The size and morphology of silver nanoparticles were determined using scanning electron microscopy. The shape of particles was spherical and their average size was about 90 nm. Comparison of different genotypes extracts showed that the plant extract with higher carbohydrate had the higher potential of reduction.

Keywords: reducing agent; silver nanoparticle; tall fescue

Date published: 2019-04-09