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Issue 13, 2012
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Fabrication of antibacterial silver nanoparticle—sodium alginate–chitosan composite films

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Abstract

A new and simple ecofriendly method for the synthesis of silver nanoparticles (Ag NPs) using a natural biopolymer, sodium alginate as both reducing and stabilizing agent is reported. The synthesized NPs were characterized using UV-Vis spectroscopy, transmission electron microscopy (TEM) and selected area electron diffraction pattern (SAED). The alginate capped NPs (Alg–Ag NPs) were found to be antibacterial. The Alg–Ag NPs were blended with varying amounts of chitosan to form polyelectrolyte complex that was cast into stable films. The films were characterized by field emission scanning electron microscopy (FESEM), optical microscopy, Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The water uptake and mechanical properties of the films were also studied. The blended film demonstrated excellent antibacterial activity against both Gram negative and Gram positive bacteria with more activity against Gram positive bacteria. Thus, the developed films have a potential to be used for various antibacterial applications in biotechnology and biomedical fields.

Graphical abstract: Fabrication of antibacterial silver nanoparticle—sodium alginate–chitosan composite films

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Publication details

The article was received on 03 Jan 2012, accepted on 12 Apr 2012 and first published on 13 Apr 2012


Article type: Paper
DOI: 10.1039/C2RA00006G
Citation: RSC Adv., 2012,2, 5837-5843
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    Fabrication of antibacterial silver nanoparticle—sodium alginate–chitosan composite films

    S. Sharma, P. Sanpui, A. Chattopadhyay and S. S. Ghosh, RSC Adv., 2012, 2, 5837
    DOI: 10.1039/C2RA00006G

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