Nanotech 2011

Hybrid bionanomaterials based on nanocrystalline TiO2 and catechol-grafted polymers: the effect of composition and morphology on photo and bioactivity

F. Cellesi
University of Manchester, UK

Keywords: hybrid bionanomaterials, TiO2 nanoparticles, dopamine, polymer shell


We proposed a synthetic strategy for producing hybrid bionanomaterials based on nanocrystalline TiO2 and catechol-grafted polymers. A sol-gel process in organic solvent was developed to grow TiO2 nanocrystals of highly controlled size and surface chemistry, and easily redispersible in water. A bio-inspired approach was then used to graft hydrophilic polymers on the TiO2 nanoparticles, utilising terminal catechol groups as chelating enediol ligands. These polymer-coated nanoparticles showed a safe cytotoxic profile and provide interesting advantages for applications in diagnostics, cell targeting and immunostimulation.

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