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Journal of Nanomaterials
Volume 2015, Article ID 943821, 6 pages
http://dx.doi.org/10.1155/2015/943821
Research Article

Green Synthesis, Characterization, and Antibacterial Activity of Silver/Polystyrene Nanocomposite

1King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11321, Saudi Arabia
2Chemistry Department, Faculty of Science, King Saud University, Riyadh 11321, Saudi Arabia
3Central Lab, College of Science, King Saud University, Riyadh 11321, Saudi Arabia
4Physics Department, Faculty of Science, King Saud University, Riyadh 11321, Saudi Arabia
5Department of Chemical Engineering, King Saud University, Riyadh 11421, Saudi Arabia
6Department of Physics, University of Dammam, P.O. Box 1982, Dammam 31441, Saudi Arabia

Received 18 April 2015; Revised 3 June 2015; Accepted 22 July 2015

Academic Editor: Bin Li

Copyright © 2015 Manal A. Awad et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A novel, nontoxic, simple, cost-effective and ecofriendly technique was used to synthesize green silver nanoparticles (AgNPs). The AgNPs were synthesized using orange peel extract as a reducing agent for silver nitrate salt (AgNO3). The particle size distribution of AgNPs was determined by Dynamic Light Scattering (DLS). The average size of silver nanoparticles was 98.43 nm. The stable dispersion of silver nanoparticles was added slowly to polystyrene solution in toluene maintaining the temperature at 70°C. The AgNPs/polystyrene (PS) nanocomposite solution was cast in a petri dish. The silver nanoparticles encapsulated within polymer chains were characterized by X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM) equipped with Energy Dispersive Spectroscopy (EDS) in addition to Transmission Electron Microscopy (TEM). The green AgNPs/PS nanocomposite film exhibited antimicrobial activity against Gram-negative bacteria Escherichia coli, Klebsiella pneumoniae and Salmonella, and Gram-positive bacteria Staphylococcus aureus. Thus, the key findings of the work include the use of a safe and simple AgNPs/PS nanocomposite which had a marked antibacterial activity which has a potential application in food packaging.