Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 710, Issue -, Pages 302-311Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.03.226
Keywords
Antimicrobial coatings; Chrome; Composites; Electrodeposition; Silver nanoparticles
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Funding
- CONACYT [CB/2013/221259, PN/2015-01-248]
- PRODEP [BUAP-PTC-374]
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Composite coatings consisting of chrome and silver nanoparticles (Cr/AgNPs) with antibacterial activity were formed via electrodeposition and characterized using X-Ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The AgNPs were uniformly distributed inside and on the surfaces of the coatings, which was corroborated using SEM-EDS. The concentration of the AgNPs in the coatings varied as a function of the concentration of AgNPs in the electrolytic bath. The antibacterial activity of the Cr/AgNPs coatings was evaluated against gram-positive Staphylococcus aureus and gram-negative Escherichia coli bacteria using two well-established microbiological techniques: a bacterial growth inhibition test and the most probable number method. The results showed effective growth inhibitions of 99.98% and 99.92% for Escherichia coli and Staphylococcus aureus, respectively, after 60 min of direct contact between the Cr/AgNP coating (5.8 mg cm(-3)) and the bacteria inoculum. (C)2017 Elsevier B.V. All rights reserved.
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