Rapid biosynthesis of silver nanoparticles using the marine red alga Laurencia catarinensis and their characterization

Abstract Bio-synthesis of AgNPs (silver nanoparticles) by using of the dry and solvent extract of red marine alga Laurencia catarinensis was conducted in the present work. Characterizations of the formed AgNPs was approved by UV–Visible Spectroscopy, Transmission Electron Microscopy, Dynamic Light Scattering and finally by Fourier Transform Infrared spectroscopy. We achieved the synthesis of AgNPs by the reduction of aqueous solutions of AgNO 3 with the powder and extract of Laurencia catarinensis . Bio-synthesis of Ag nanoparticles was confirmed by visual inspection. The obtained algal nanoparticles were characterized by highly stable formation, short time of the biogenic process (2 min-3 h), small size (39.41–77.71 nm) with several shapes (spherical, triangular, rectangle, polyhedral and hexagonal).