Abstract
Nanoparticles' surface properties can be used as triggers to regulate or even enhance biological response and generate tailored structures to substitute conventional antibiotics. Here, silica nanoparticles surface was duly tuned in order to increase the water-insoluble drug load (curcumin) and improve the antibacterial activity. Our main motivation was based on the electrostatic attraction between the positively charged amino groups and the negatively charged curcumin and/or bacteria membrane. In addition, the variation of amino grafting amount on silica nanoparticles indicated that the grafting increase was directly related to the extent of drug entrapped into the nanoparticles as well as to the bactericidal activity. The combination of amino-functionalized silica nanoparticles associated with the presence of curcumin allowed to produce a dual bactericidal system that shows promising perspective for its use in biomedical applications.
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