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Mirza Farhana Ishaque, Nabila Anwar Patrawala and Dr. D. R. Majumder*


The microorganisms showed the unique potential in the production and accumulation of nano metals with different shapes and sizes by „bioleaching‟. The biological system – Aspergillus species a fungus, isolated from soil was capable of synthesizing nanoparticles such as lithium, lead, and copper using LiCl3 (0.025M), Pb(NO3)2 (0.0002M), and CuSO4(0.025M) as a precursor metal salt. The morphology and the size of the synthesized nano metals as per Scanning Electron Microscopy micrograph confirmed the formation of LiNPs with 85 nm – 100 nm size range, CuNPs with 80 nm – 86 nm in range and PbNPs with 70 nm – 95 nm in range and all three were almost spherical in shape. These nano Metals were further characterized by UV Visible Spectrophotometry, Xray differaction analysis, Fourier Transform Infrared analysis, Cyclic Voltammetry. The ability of these nanoparticles in the field of electronics for the use in batteries were also tested. This green synthesis at room temperature was the most ecofriendly way to produce nano metals.

Keywords: Bioleaching, Biosynthesis of Nano Metals, LiNP, CuNP, PbNP, Aspergillus species.

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