Enhancing the antimicrobial activity of silver nanoparticles against pathogenic bacteria by using DC extract in microwave assisted green synthesis.

This study presents an optimized microwave-assisted method for the green synthesis of silver nanoparticles (AgNPs) using a root extract obtained from DC. The influence of temperature, reagent concentration, and irradiation time was systematically investigated to enhance synthesis yield. Characterization techniques including XRD, UV-vis, FTIR, XPS, and zetametry were employed to confirm the successful formation of nanoparticles with a metallic silver core (∼17 nm) functionalized with organic molecules derived from the plant extract.

Evaluation of the antimicrobial activity of silver nanoparticles obtained by microwave-assisted green synthesis using (Mart. ex DC.) Mattos underbark extract.

We describe here a green method for the preparation of silver nanoparticles (AgNPs), by a microwave-assisted synthesis route using underbark extract, with antibacterial activity. After optimizing the synthesis parameters with a Box-Benhken designed experiment, samples were characterized by powder XRD, TEM, UV-Vis spectroscopy, FTIR and zetametry. Using the overall optimized conditions of synthesis - time of reaction 15 min at 200 °C and plant extract/AgNO volume ratio equal to 10% - highly crystalline ∼13.