World Journal of Microbiology and Biotechnology

, Volume 31, Issue 8, pp 1279–1283 | Cite as

Screening of cyanobacterial extracts for synthesis of silver nanoparticles

  • Shaheen Husain
  • Meryam Sardar
  • Tasneem FatmaEmail author
Short Communication


Improvement of reliable and eco-friendly process for synthesis of metallic nanoparticles is a significant step in the field of application nanotechnology. One approach that shows vast potential is based on the biosynthesis of nanoparticles using micro-organisms. In this study, biosynthesis of silver nanoparticles (AgNP) using 30 cyanobacteria were investigated. Cyanobacterial aqueous extracts were subjected to AgNP synthesis at 30 °C. Scanning of these aqueous extracts containing AgNP in UV–Visible range showed single peak. The λ max for different extracts varied and ranged between 440 and 490 nm that correspond to the “plasmon absorbance” of AgNP. Micrographs from scanning electron microscope of AgNP from cyanobacterial extracts showed that though synthesis of nanoparticles occurred in all strains but their reaction time, shape and size varied. Majority of the nanoparticles were spherical. Time taken for induction of nanoparticles synthesis by cyanobacterial extracts ranged from 30 to 360 h and their size from 38 to 88 nm. In terms of size Cylindrospermum stagnale NCCU-104 was the best organism with 38 and 40 nm. But in terms of time Microcheate sp. NCCU-342 was the best organism as it took 30 h for AgNP synthesis.


AgNP Cyanobactrial extracts Scanning electron microscope (SEM) Microchaete sp. NCCU-342 Cylindrospermum stagnale NCCU-104 



The financial support provided by UGC, Government of India is greatly acknowledged. We also acknowledge Director of Centre of Nanotechnology, Jamia Mllia Islamia, New Delhi, India for helping in SEM analysis.


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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  1. 1.Department of BiosciencesJamia Millia Islamia (Central University)New DelhiIndia

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