Tannic acid: A natural source to tailor nano crystalline silver particles of different morphologies

Tannic Acid: A Natural Source To Tailor Nano Crystalline Silver Particles Of Different Morphologies As Antibacterial Agent

Henam Premananda Singh1, Sarbjeet Singh Gujral2, Surinder Kumar Sharma2, Rakesh Kumar Sharma1*

1Nanotechnology and Drug Delivery Research Lab, Department of Chemistry, University of Delhi, Delhi 110007, India

2Maharaja Surajmal Institute of Pharmacy, Janak Puri, New Delhi 110058, India

Adv. Mater. Lett., 2015, 6 (12), pp 1043-1049

DOI: 10.5185/amlett.2015.5946

Publication Date (Web): Nov 24, 2015

E-mail: sharmark101@yahoo.com


In this work we have successfully prepared spherical and chain type silver nanoparticles of excellent size’s homogeneity, reproducibility and stability using tannic acid. The synthesized nanometallic structures were characterized for their shape, size, thermal stability and crystalline nature. The mechanism for the formation of Ag NPs and shape evolution of the chain structure has been vividly explained. Further, these NPs were found to exhibit significant antibacterial activity against gram negative Escherichia coli bacteria but to different extend indicating the influence of particles morphology on their antibacterial behaviours.


Bio-synthesis, tannic acid, silver nanoparticles, spherical chain, antibacterial activity.

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