Green Synthesis of Silver and Gold Nanoparticles Using Extract of Blackcurrant

The presented study is dedicated to the green synthesis of stable gold and silver nanoparticles using natural polyphenols isolated from blackcurrant (Ribes nigrum L.) extract. A polyphenol fraction was prepared from the raw extract of blackcurrant fruits using solid-state extraction (C
₁₈
reversed-phase). HPLC-DAD chromatography analyses have shown that the major components of used extract were anthocyanins (delphinidin-3-glucoside, delphinidin-3-rutinoside, cyanidin-3-glucoside, and cyanidin-3-rutinoside). Green protocol for the synthesis of gold and silver nanoparticles was developed through the optimization of reaction conditions (reactants ratio, pH of solutions, reaction time and temperature). The alkali conditions were observed to be necessary for the synthesis of highly mono-disperse spherical gold nanoparticles (diameter of 10 nm).