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A biofabrication approach for controlled synthesis of silver nanoparticles with high catalytic and antibacterial activities

Paper ID Volume ID Publish Year Pages File Format Full-Text
3142 152 2014 11 PDF Available
Title
A biofabrication approach for controlled synthesis of silver nanoparticles with high catalytic and antibacterial activities
Abstract

•Biomediated synthesis of Ag nanoparticles with controlled sizes is presented.•Tobacco mosaic virus (TMV) acts as an efficient sacrificial biomediator.•Ag particles show high catalytic activity for nitrophenol hydrogenation reaction.•TMV-mediated Ag nanoparticles have high antibacterial activities against E. coli.

We report simple, facile and size-controllable synthesis of uniform Ag nanoparticles with tobacco mosaic virus (TMV) as a biomediator in the absence of external reducing agents. UV–vis and TEM analysis show that Ag nanoparticles with average diameter of 2, 4 and 9 nm were obtained by simply tuning the ratio of TMV/Ag(NH3)2+. The Ag formation in the presence of TMV showed autocatalytic growth followed by coalescence. The as-prepared TMV-mediated Ag nanoparticles show substantially higher catalytic and antibacterial activities than previous results. For the 4-nitrophenol hydrogenation reaction, the rate constants per surface area for 2 and 9 nm Ag nanoparticles were determined to be 0.64 and 1.2 L m−2 s−1 respectively. Both Kirby–Bauer disk diffusion test and tube culture results demonstrate high antibacterial activity of TMV-mediated Ag particles against Escherichia coli, with minimal inhibition concentration (MIC) of 2.3 and 2.5 ppm for 2 and 9 nm Ag nanoparticles respectively. We expect that our biomediated Ag synthesis approach can be readily extended to other biomaterials and metal nanoparticle systems.

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Keywords
Silver nanoparticles; Tobacco mosaic virus; Biomimetics; Polypeptides; Growth kinetics; Heterogeneous reaction
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A biofabrication approach for controlled synthesis of silver nanoparticles with high catalytic and antibacterial activities
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 89, 15 August 2014, Pages 10–20
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us