Molecular Engineering of Hybrid Dye−Silica Fluorescent Nanoparticles: Influence of the Dye Structure on the Distribution of Fluorophores and Consequent Photoemission Brightness
Articolo
Data di Pubblicazione:
2012
Abstract:
This work was addressed to the elucidation of molecular parameters that rule the distribution of organic fluorophores throughout the nascent inorganic network during the synthesis of hybrid dye−silica nanoparticles by the reverse microemulsion method, which involves the partition of reactants among bulk oil phase, surfactant palisade, and inner water core. The evolution of the photophysical properties (absorption and steady-state and time-resolved photoluminescence) of threecyanine dyes, differing for the number of sulfonic substituents, from the starting microemulsion to the final nanoparticles provided evidence of the key role of the hydrophilicity of the fluorophores in ruling the dispersion within the SiO2 matrix.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
hybrid dye-silica nanoparticles, engineered synthesis, photoluminescence, dye hydrophilicity
Elenco autori:
Gabriele Alberto; Giuseppe Caputo; Guido Viscardi; Salvatore Coluccia; Gianmario Martra
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