Spontaneous adsorption of silver nanoparticles on Ti/TiO2 surfaces. Antibacterial effect on Pseudomonas aeruginosa

CONSTANZA Y. FLORES; CAROLINA DIAZ; ALDO RUBERT; GUILLERMO BENITEZ; M.SERGIO MORENO; MONICA FERNANDEZ LORENZO DE MELE; ROBERTO SALVAREZZA; PATRICIA SCHILARDI; CAROLINA VERICAT

JOURNAL OF COLLOID AND INTERFACE SCIENCE

ACADEMIC PRESS INC ELSEVIER SCIENCE

Lugar: Amsterdam; Año: 2010

0021-9797

Titanium a corrosion-resistant and biocompatible material widely used in medical and dental implants. Titanium surfaces, however, are prone to bacterial colonization that could lead to infection, inflammation,and finally to implant failure. Silver nanoparticles (AgNPs) have demonstrated an excellent performanceas biocides, and thus their integration to titanium surfaces is an attractive strategy to decrease the risk of implant failure. In this work a simple and efficient method is described to modify Ti/TiO2 surfaces with citrate-capped AgNPs. These nanoparticles spontaneously adsorb on Ti/TiO2, forming nanometer-sized aggregates consisting of individual AgNPs that homogeneously cover the surface. The modified AgNP?Ti/TiO2 surface exhibits a good resistance to colonization by Pseudomonas aeruginosa, a model system for biofilm formation.