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Optically activated and interrogated plasmonic hydrogels for applications in wound healing
Authors:Alessio Milanesi  Giada Magni  Sonia Centi  Gioacchino Schifino  Annalisa Aluigi  Boris N Khlebtsov  Lucia Cavigli  Andrea Barucci  Nikolai G Khlebtsov  Fulvio Ratto  Francesca Rossi  Roberto Pini
Abstract:We disclose the use of hybrid materials featuring Au/Ag core/shell nanorods in porous chitosan/polyvinyl alcohol scaffolds for applications in tissue engineering and wound healing. The combination of Au and Ag in a single construct provides synergistic opportunities for optical activation of functions as near infrared laser tissue bonding, and remote interrogation to return parameters of prognostic relevance in wound healing monitoring. In particular, the bimetallic component ensures optical tunability, enhanced shelf life and photothermal stability, serves as a reservoir of germicidal silver cations, and changes in near‐infrared and visible color according to the environmental level of oxidative stress. At the same time, the polymeric blend is ideal to bind connective tissue upon photothermal activation, and to support fabrication processes that provide high porosity, such as electrospinning, thus putting all the premises for cellular repopulation and antimicrobial protection.image
Keywords:chitosan hydrogels  electrospinning  gold nanorods  laser welding  oxidative stress monitoring  silver nanoparticles
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