Phyto-fabrication of brown seaweed Dictyota ciliolata extract towards silver nanoparticles synthesis and evaluation of mosquito-larvicidal potential of the synthesized AgNPs

Bio-fabrication of silver nanoparticles (AgNPs) was performed using the extracts of the brown seaweed Dictyota ciliolata (DC) and the resultant AgNPs were characterized by biophysical and chemical techniques. A prominent absorbance peak observed at 417 nm in the UV-Vis spectroscopy confirmed the presence of AgNPs. The FTIR spectrum revealed the presence of various functional groups at 2988.16, 1763.58, 1375.96, 1242.9 and 1055.84 cm-1 which indicates their involvement in the stabilization of nanoparticles. XRD analysis showed the crystalline nature of DC-AgNPs. SEM analysis confirmed the presence of particles with an agglomerated clusters of micro flakes-like structure with the size range of 10 –120 nm. The weight percentage of elemental silver was determined as 54.96