Reduction of Silver Ions by Cell Free Extracts of Westiellopsis sp.
Biosynthesis of silver nanoparticles using Westiellopsis sp. (A15), a filamentous cyanobacterium belonging to the family Fischerellaceae, has been demonstrated. Aqueous silver ions (Ag(+)) when exposed to the culture filtrate of Westiellopsis were reduced in the solution, which were characterized by biophysical measures utilizing the UV-Vis spectroscopy, scanning electron microscopy (SEM), and FTIR. The nanoparticles exhibited the maximum absorbance at 420 nm in UV-Vis spectroscopy, while the SEM micrograph revealed that the aggregated nanoparticles vary in size between 20 nm and 5 µm. However, the FTIR analysis provided evidence for presence of proteins in the filtrate to be involved in the reduction of silver ions.
Department of Bioinformatics, Bharathiar University, Coimbatore 641 046, India ; Phytomatics Laboratory, Centre for Bioinformatics, School of Life Sciences, Pondicherry University, Puducherry 605 014, India.
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Lakshmi
Department of Bioinformatics, Bharathiar University, Coimbatore 641 046, India.
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Priyanka
Plant Molecular Biology Laboratory, Department of Biotechnology, School of Biotechnology and Health Sciences, Karunya University, Coimbatore 641 114, India.
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Annamalai