Gold nanoparticles with an average diameter of 10 nm, functionalized by the dye molecule rhodamine B isothiocyanate, have been synthesized. The resulting material has been extensively characterized both chemically, to investigate the bonding between the dye molecules and the nanoparticles, and physically, to understand the details of the aggregation induced by interaction between dye molecules on different nanoparticles. The plasmonic response of the system has been further characterized by measurement and theoretical simulation of the static UV–Vis extinction spectra of the aggregates produced following different synthesis procedures. The model parameters used in the simulation gave further useful information on the aggregation and its relationship to the plasmonic response. Finally, we investigated the time dependence of the plasmonic effects of the nanoparticles and fluorescence of the dye molecule using an ultrafast pump–probe optical method. By modulating the quantity of dye molecules on the surface of the nanoparticles it was possible to exert fine control over the plasmonic response of nanoparticles. © 2017 Elsevier Inc.

Gold nanoparticles functionalized by rhodamine B isothiocyanate. A new tool to control plasmonic effects / Fratoddi, I; Cartoni, A; Venditti, I; Catone, D.; O'Keeffe, P.; Paladini, A.; Toschi, F.; Turchini, S; Sciubba, F; Testa, G; Battocchio, C; Carlini, L; Proietti Zaccaria, R; Magnano, E; Pis, I.; Avaldi, L.. - In: JOURNAL OF COLLOID AND INTERFACE SCIENCE. - ISSN 0021-9797. - STAMPA. - 513:(2018), pp. 10-19. [10.1016/j.jcis.2017.11.010]

Gold nanoparticles functionalized by rhodamine B isothiocyanate. A new tool to control plasmonic effects

Fratoddi, I;Cartoni, A;Sciubba, F;Testa, G;
2018

Abstract

Gold nanoparticles with an average diameter of 10 nm, functionalized by the dye molecule rhodamine B isothiocyanate, have been synthesized. The resulting material has been extensively characterized both chemically, to investigate the bonding between the dye molecules and the nanoparticles, and physically, to understand the details of the aggregation induced by interaction between dye molecules on different nanoparticles. The plasmonic response of the system has been further characterized by measurement and theoretical simulation of the static UV–Vis extinction spectra of the aggregates produced following different synthesis procedures. The model parameters used in the simulation gave further useful information on the aggregation and its relationship to the plasmonic response. Finally, we investigated the time dependence of the plasmonic effects of the nanoparticles and fluorescence of the dye molecule using an ultrafast pump–probe optical method. By modulating the quantity of dye molecules on the surface of the nanoparticles it was possible to exert fine control over the plasmonic response of nanoparticles. © 2017 Elsevier Inc.
gold nanoparticles; plasmonic nanoparticles; rhodamine B; transient spectroscopy; electronic; optical and magnetic materials; biomaterials; surfaces; coatings and films; colloid and surface chemistry
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Gold nanoparticles functionalized by rhodamine B isothiocyanate. A new tool to control plasmonic effects / Fratoddi, I; Cartoni, A; Venditti, I; Catone, D.; O'Keeffe, P.; Paladini, A.; Toschi, F.; Turchini, S; Sciubba, F; Testa, G; Battocchio, C; Carlini, L; Proietti Zaccaria, R; Magnano, E; Pis, I.; Avaldi, L.. - In: JOURNAL OF COLLOID AND INTERFACE SCIENCE. - ISSN 0021-9797. - STAMPA. - 513:(2018), pp. 10-19. [10.1016/j.jcis.2017.11.010]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1017772
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