Ecofriendly synthesis of silver nanoparticles from commercially available plant powders and their antibacterial properties

Use of various plant materials for the biosynthesis of nanoparticles is considered a greentechnology, as it does not involve any harmful chemicals. the present study reports that silvernanoparticles (ag nps) were synthesized from a silver nitrate solution by commercially available plantpowders, such as solanum tricobatum, syzygium cumini, centella asiatica and citrus sinensis. ag nps werecharacterized by uvvis spectrophotometer, x-ray diffractometer (xrd), atomic force microscopy (afm)and fourier transform infrared (ftir) spectroscopy. the formation and stability of the reduced silvernanoparticles in the colloidal solution were monitored by uvvis spectrophotometer analysis. the meanparticle diameter of silver nanoparticles was calculated from the xrd pattern, according to the line widthof the plane, and the refraction peak, using scherrer's equation. afm showed the irregular shapes of agnps, and the formation of silver nanoparticles was found to be 53, 41, 52 and 42 nm, corresponding tosyzygium cumini, citrus sinensis, solanum tricobatum and centella asiatica, respectively. ftir spectroscopyconfirmed the presence of protein as the stabilizing agent surrounding the ag nps. antimicrobial activity ofthe silver bio-nanoparticles was performed by a well diffusion method. the highest antimicrobial activityof ag nps synthesized by c. sinensis and c. asiatica was found against pseudomonas aeruginosa (16 mm). theag nps synthesized in this process were found to have efficient antimicrobial activity against pathogenicbacteria.