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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2251
Title: Spectroscopic analysis and catalytic application of biopolymer capped silver nanoparticle, an effective antimicrobial agent
Authors: Pramanik N.
Bhattacharyya A.
Kundu, Patit Paban
Published in: Journal of Applied Polymer Science
Abstract: Microbial reduction of silver ion (conc. 1 mM AgNO3) was performed by Alkaliphilus oremlandii strain ohILAs in an alkaline pH 10. The synthesized silver nanoparticle was stabilized by poly(3-hydroxybutyrate-co-3-hydroxyvalerate) biopolymer which was also synthesized by the microbial culture of Alkaliphilus oremlandii strain ohILAs at pH8. The particle size and shape of the silver nanoparticles was studied by dynamic light scattering and under a transmission electron microscope and it was found that the particle size of polymer stabilized colloidal silver was comparatively lower (22-43nm) than that for the unstabilized one (63-93 nm). The stabilization of nanoparticles in polymer dispersed medium after around 60 days was confirmed from analysis of UV-visible spectroscopy and scanning electron microscopy. The crystalline peaks as recorded with X-ray's diffraction were observed at 2h values of 38° and 43°, indicating the fcc crystalline structure of the silver nanoparticle. The antimicrobial activity of silver nanoparticles on gramnegative bacteria strain (Escherichia coli XL1B) and gram-positive strain (Lysinibacillus fusiformis) showed better performance by the solution of polymer stabilized nanoparticle than that for the non polymer stabilized one. The reduction of nitro group in p-nitrophenol to p-aminophenol was observed from the analysis of UV-Visible spectroscopy in which, the shifting of absorption peak at 400 to 295 nm and the simultaneous regeneration of light brown color (?max 410 nm) of silver nanoparticles confirmed the catalytic activity of silver nanomaterials. © 2014 Wiley Periodicals, Inc.
Citation: Journal of Applied Polymer Science (2015), 132(8): -
URI: https://doi.org/10.1002/app.41495
http://repository.iitr.ac.in/handle/123456789/2251
Issue Date: 2015
Publisher: John Wiley and Sons Inc.
Keywords: Biosynthesis of polymers
Nanoparticles
Nanowires and nanocrystals
Spectroscopy
ISSN: 218995
Author Scopus IDs: 56324545100
56075861300
35475516300
Author Affiliations: Pramanik, N., Advanced Polymer Laboratory, Department of Polymer Science and Technology, University of Calcutta, Kolkata, West Bengal 700009, India
Bhattacharyya, A., Advanced Polymer Laboratory, Department of Polymer Science and Technology, University of Calcutta, Kolkata, West Bengal 700009, India
Kundu, P.P., Advanced Polymer Laboratory, Department of Polymer Science and Technology, University of Calcutta, Kolkata, West Bengal 700009, India
Corresponding Author: Kundu, P.P.; Advanced Polymer Laboratory, Department of Polymer Science and Technology, University of CalcuttaIndia
Appears in Collections:Journal Publications [CH]

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