The biosynthesis of silver nanoparticles using plant extracts

The possibility of using plant extracts based on stevia for the synthesis of silver nanoparticles is considered. Sols of silver nanoparticles were obtained by the method of "green chemistry" using phytoextracts of tea herbal tea and stevia. The absorption spectra of colloidal solutions of silver nanoparticles with different concentrations of phytoextracts were obtained. The absorption maximum at 410 — 430 nm indicates the formation of spherical nanoparticles with a diameter of up to 40 nm. An increase in the color intensity of sols indicates that the number of nanoparticles increases with increasing concentration of extracts.