Anchoring of Gold Nanoparticles on Graphene Oxide and Noncovalent Interactions with Porphyrinoids
作者： Suzana M. Andrade , Carlos J. Bueno-Alejo , Vanda V. Serra , João M. M. Rodrigues , Maria G. P. M. S. Neves
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摘要: The interaction of tetrasulfonated aluminium phthalocyanine (AlPcS4) and meso-tetraarylporphyrin monosubstituted with poly-l-lysine (MM-PLL), graphene oxide (GO) is studied in aqueous solution using spectroscopic microscopic techniques. study also performed the presence gold nanoparticles (AuNP) grown on surface GO a sonochemical method. strong quenching porphyrin luminescence demonstrates important interactions between excited state molecule which are absent case phthalocyanine. However, AuNP@GO hybrid concomitant increase fluorescence intensity takes place together decrease lifetimes involving plasmon coupling effect. latter overcome MM-PLL due to stronger GO, corroborated for deposited samples lifetime imaging microscopy (FLIM). These new nanostructures thus expected have selective sensing abilities.
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