Green synthesis of silver nano-insecticide from <i>Polygonum hydropipper</i> (Polygonaceae)

Developing eco-friendly and cost-effective green synthesis of metallic nanoparticles using an array of natural resources has garnered significant interest in recent years for their diverse sustainable applications, including agriculture. In our present investigation for green synthesis of silver nanoparticles (AgNPs), phytochemicals present on the <i>Polygonum hydropipper</i> (Family: Polygonaceae) leaf extract acted as a reducing and stabilising agent owing to their active phytoconstituents. Biosynthesis of AgNPs was confirmed using various physio-chemical methods including UV-Vis spectrophotometry, Dynamic Light Scattering (DLS) analysis, Zeta potential, Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM). The Fourier Transform Infra-red Spectrograph (FTIR) analysis revealed strong peaks in the range of 638-3246.3 cm^-1, confirming the presence of various functional groups <i>viz</i>., O-H, C-H, C = C and O = C = O on the biosynthesized compound. The methodology employed in our study for the biosynthesis of AgNPs utilising <i>P. hydropiper</i> leaf extract exhibits significant potential for future technological advancements.