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Journal of Nanomaterials
Volume 2013, Article ID 901452, 6 pages
http://dx.doi.org/10.1155/2013/901452
Research Article

Transparent Nanocrystallite Silver for Antibacterial Coating

Corrosion and Coating Laboratory, Physics Department, Universiti Malaya, 50603 Kuala Lumpur, Malaysia

Received 18 March 2013; Revised 27 May 2013; Accepted 27 May 2013

Academic Editor: William W. Yu

Copyright © 2013 W. Ahliah Ismail 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

Transparent sol-gel film with antibacterial coating property incorporating silver nanoparticles has been successfully developed. Silver nanoparticles were synthesized by precipitation method at room temperature. XRD structural studies show that crystallite sizes in the range of 18 nm to 40 nm were produced. The coating system used methyltrimethoxy silane as binder and N-propanol as diluent to obtain the highest transperancy. 2.5% wt of nanosilver crystallites was added as antibacterial agent. The coating mixture was applied onto glass plates using sponges and tested against Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa. Values of antimicrobial activity of 4.6, 7.2, and 4.2 were, respectively, obtained for Staphylococcus aureus, Escherichia coli and Pseudomonas Aeruginosa. Coating with antimicrobial activity greater than 2 classified as antibacterial.