BIOLOGICAL SYNTHESIS OF SILVER NANOPARTICLES OF ADIANTUM CAPILLUS-VENERIS L. AND THEIR EVALUATION OF ANTIBACTERIAL ACTIVITY AGAINST HUMAN PATHOGENIC BACTERIA

To develop a novel approach for the biological synthesis of silver nanoparticles using water extract of whole plant parts ofAdiantum capillus-veneris L. which has been proven to be  active against human pathogenic bacteria such as Streptococcus pyogenes, Staphylococcus aereus, Escherichia coli and Klebsiella pneumonia. Characterization of nanoparticles was determined by using Ultra Violet-Visible (UV-Vis) spectrometry, Scanning Electron Microscopy (SEM), Energy Dispersive X-ray (EDX), X-ray Diffraction (XRD).  The synthesis of nanoparticles was confirmed by the change of colour pale green to reddish brown. Further, a peak between 200nm to 2500nm wavelength was obtained on UV-VIS spectrometer which confirmed the biosynthesis of silver nanoparticles. SEM showed the formation of Silver nanoparticles with an average size of 25.71 nm-37.96 nm. X-ray diffraction analysis showed that the particles were crystalline in nature with cubic structure of the bulk silver with the broad peaks 38⁰, 64⁰, 67⁰. It concluded that present study of A. capillus-veneriscan be good source for biological synthesis of silver nanoparticles which shows a good antibacterial activity of human pathogenic bacteria. The outcome of the study will be the development of new anticancer drugs from the synthesized nano particle of the Adiantum capillus-veneris for biomedical and other industrial applications.