Nano Archive

Preparation and bactericide activity of gallic acid stabilized gold nanoparticles

Moreno-Alvarez, S. A. and Marti­nez-Castanon, G. A. and Nino-Marti­nez, N. and Reyes-Maci­as, J. F. and Patino-Marin, N. and Loyola-Rodriguez, J. P. and Ruiz, Facundo (2010) Preparation and bactericide activity of gallic acid stabilized gold nanoparticles. Journal of Nanoparticle Research, 12 (8). pp. 2741-2746.

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In this work, gold nanoparticles with three different sizes (13.7, 39.4, and 76.7 nm) were prepared using a simple aqueous method with gallic acid as the reducing and stabilizing agent, the different sizes were obtained varying some experimental parameters as the pH of the reaction and the amount of the gallic acid. The prepared nanoparticles were characterized using X-ray diffraction, transmission electron microscopy, dynamic light scattering, and UV–Vis spectroscopy. Samples were identified as elemental gold and present spherical morphology, a narrow size distribution and good stabilization according to TEM and DLS results. The antibacterial activity of this gallic acid stabilized gold nanoparticles against S. mutans (the etiologic agent of dental caries) was assessed using a microdilution method obtaining a minimum inhibitory concentration of 12.31, 12.31, and 49.25 μg/mL for 13.7, 39.4, and 76.7 nm gold nanoparticles, respectively. The antibacterial assay showed that gold nanoparticles prepared in this work present a bactericide activity by a synergistic action with gallic acid. The MIC found for this nanoparticles are much lower than those reported for mixtures of gold nanoparticles and antibiotics.

Item Type:Article
Uncontrolled Keywords:Gold nanoparticles - Gallic acid - Bactericide - Synthesis - Nanobiomedicine
Subjects:Material Science > Nanochemistry
ID Code:9947
Deposited By:CSMNT
Deposited On:14 Jan 2011 07:25
Last Modified:14 Jan 2011 07:25

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