Photo-responsive antibacterial surfaces combining both on-demand photo-switchable activity and sustained biocidal release were prepared using sequential chemical grafting of nano-objects with different geometries and functions. The multi-layered coating developed incorporates a monolayer of near-infrared active silica-coated gold nanostars (GNS) decorated by silver nanoparticles (AgNP). This modular approach also enables us to unravel static and photo-activated contributions to the overall antibacterial performance of the surfaces, demonstrating a remarkable synergy between these two mechanisms. Complementary microbiological and imaging evaluations on both planktonic and surface-attached bacteria provided new insights on these distinct but cooperative effects.
Pallavicini, P., Bassi, B., Chirico, G., Collini, M., Dacarro, G., Fratini, E., et al. (2017). Modular approach for bimodal antibacterial surfaces combining photo-switchable activity and sustained biocidal release. SCIENTIFIC REPORTS, 7(1) [10.1038/s41598-017-05693-3].
Modular approach for bimodal antibacterial surfaces combining photo-switchable activity and sustained biocidal release
Chirico, Giuseppe;Collini, Maddalena;Sironi, Laura;
2017
Abstract
Photo-responsive antibacterial surfaces combining both on-demand photo-switchable activity and sustained biocidal release were prepared using sequential chemical grafting of nano-objects with different geometries and functions. The multi-layered coating developed incorporates a monolayer of near-infrared active silica-coated gold nanostars (GNS) decorated by silver nanoparticles (AgNP). This modular approach also enables us to unravel static and photo-activated contributions to the overall antibacterial performance of the surfaces, demonstrating a remarkable synergy between these two mechanisms. Complementary microbiological and imaging evaluations on both planktonic and surface-attached bacteria provided new insights on these distinct but cooperative effects.File | Dimensione | Formato | |
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