Extracellular Synthesis of Ag Nanoparticles Using Escherichia Coli and Their Antimicrobial Efficacy
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چکیده
Microbe mediated synthesis of nanoparticles is gaining tremendous importance in present time due to its harmless and eco-friendly nature. The present study deals with synthesis of silver nanoparticles using the bacteria Escherichia coli extracellularly and evaluation of its antimicrobial activity. The nanoparticles were characterized by various means like UV Vis spectroscopy, TEM analysis, zeta potential analysis and FTIR analysis. The antimicrobial activity was tested by agar well diffusion method against Staphylococcus aureus (MTCC 87), Proteus mirabilis (MTCC 3310), Bacillus cereus (MTCC-1305) and Aspergillus niger (MTCC-9652). From the present study it can be concluded that the synthesized Ag nanoparticles exhibits significant antimicrobial activity against both Gram positive and Gram-negative bacteria and also against the tested fungus.
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تاریخ انتشار 2017