PUMA
Istituto dei materiali per l'elettronica ed il magnetismo     
Rodríguez-Argüelles M. C., Sieiro C., Cao R., Nasi L. Chitosan and silver nanoparticles as pudding with raisins with antimicrobial properties. In: Journal of Colloid and Interface Science, vol. 364 (1) pp. 80 - 84. ELSEVIER, 2011.
 
 
Abstract
(English)
Chitosan nanoparticles (CS-NP) containing small silver nanoparticles are reported (Ag@CS-NP). CS-NP was synthesized using tripolyphosphate (TPP) as a polyanionic template. TPP also served to electrostatically attract Ag+ inside CS-NP, where it was reduced by the terminal glucosamine units of the biopolymer. This procedure is environmental friendly, inexpensive, and permits the synthesis of very small AgNP (0.93-1.7 nm), with only a discrete dependence from the amount of silver nitrate used (5-200 mg). The obtained hybrid nanocomposites Ag@CS-NP were characterized by DLS, HRTEM, and HAADF-STEM presenting a mean hydrodynamic diameter of 78 nm. The antimicrobial activity of Ag@CS-NP against Candida glabrata, Sacharomyces cerevisiae, Escherichia coli, Klebsiella pneumoniae, Salmonella, Staphylococcus aureus, and Bacillus cereus corresponded to MIC values lower than for AgNO3.
URL: http://www.sciencedirect.com/science/article/pii/S0021979711009830
DOI: http://dx.doi.org/10.1016/j.jcis.2011.08.006
Subject Antimicrobial
Chitosan
Nanoparticle
Nanocomposite
Silver
TEM


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