Preparation and antibacterial properties of hybrid-zirconia films with silver nanoparticles |
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Authors: | Ignacio Azó car,Esteban Vargas,Nicole Duran,Abel Arrieta,Evelyn Gonzá lez,Jorge Pavez,Marcelo J. Kogan,Jose H. Zagal,Maritza A. Paez |
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Affiliation: | 1. Departamento de Química de los Materiales, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Avenida Bernardo O''Higgins 3363, Casilla 40, Correo 33, Santiago, Chile;2. Facultad de Ingeniería, Departamento de Metalurgia, Universidad de Santiago de Chile, USACH, Chile;3. Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, USACH, Chile;4. Departamento de Química Farmacológica y Toxicológica, Facultad de Ciencias Químicas, Universidad de Chile, Sergio Livingstone Polhammer 1007, Santiago, Chile |
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Abstract: | The antimicrobial effect of incorporating silver nanoparticles (AgNps) into zirconia matrix–polyether glycol was studied. AgNps of 4–6 nm in size were synthesized using the inverse micelles method, and different doses of metallic nanoparticles were incorporated into zirconia–polyether glycol mixtures during the ageing procedure. Atomic force microscopy (AFM) of the modified hybrid film showed a homogenous distribution of 20–80 nm diameter AgNps, indicating agglomeration of these structures during film modification; such agglomerations were greater when increasing the dosage of the colloidal system. The AgNps-hybrid films showed higher antimicrobial activity against Gram-positive bacteria than for Gram-negative bacteria. Hybrid films prepared with dioctyl sodium sulfosuccinate (AOT) stabilized AgNps presented enhanced antibacterial activity compared to that obtained through the addition of a high AgNO3 concentration (0.3 wt%). |
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Keywords: | Sol-gel growth Biomaterials Nanostructures Coatings Atomic force microscopy (AFM) |
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