Volume : IV, Issue : I, January - 2014

Synthesis and Characterization of Nanosilver–A blue green approach

Piya Roychoudhury, Ruma Pal

Abstract :

In our thorough investigation of suitability of cyanobacterial strains, commonly known as blue green algae, for cheap ecofriendly nanometal formation, Leptolyngbya valderianum was found to be an effective bioreagent for nanosilver production. The nanosilver synthesis at intracellular level was indicated by the own biomass of Leptolyngbya after 72 hrs of dark exposure in 9 mM AgNO3 solution. Intracellular silver particles were extracted from the silver loaded biomass and nanosilver production was determined by UV-vis spectroscopy showing absorption peak at ~411 nm. Extracted nanoparticles were further characterized by dynamic light scattering (DLS), zeta potential and X-ray diffraction (XRD) studies. Transmission electron microscopy (TEM) revealed the spherical shape of AgNPs with 2 to 20 nm in diameter. The XRD indicated the 2θ values at 38.20, 44.50, 65.60 and 78.60 which confirmed again the reduction of Ag (I) to Ag (0). Antibiotic property of the AgNP was tested by Agar well diffusion method.

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Article: Download PDF   DOI : 10.36106/ijar  

Cite This Article:

Piya Roychoudhury, Ruma Pal Synthesis and Characterization of Nanosilver-A blue green approach Indian Journal of Applied Research, Vol.IV, Issue. I


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