One step green synthesis of hexagonal silver nanoparticles and their biological activity

Hexagonal and spherical silver nanoparticles were prepared by in situ and green synthesis using sun light as reducing agent with assistance newly prepared cationic surfactant which act also as capping agents. The silver nanoparticles formation was investigated using UV–vis spectrophotometer, transmission electron microscope (TEM), dynamic light scattering (DLS), energy dispersive X-ray (EDX) and FTIR. The results showed formation uniform, well arrangement hexagonal and spherical shapes. Increasing hydrophobic chain length increase the stability and amount of AgNPS. Both prepared surfactants and surfactants capping silver nanoparticles showed high antimicrobial activity against Gram-positive and Gram-negative bacteria.