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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemical engineering
Gold nanoparticles functionalized by rhodamine B isothiocyanate: A new tool to control plasmonic effects
Journal of Colloid and Interface Science, Volume 513, Year 2018
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Description
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.
Authors & Co-Authors
Fratoddi, Ilaria
Italy, Rome
Sapienza Università Di Roma
Cartoni, Antonella
Italy, Rome
Sapienza Università Di Roma
Italy, Rome
Consiglio Nazionale Delle Ricerche
Venditti, Iole
Italy, Rome
Università Degli Studi Roma Tre
Catone, D.
Italy, Montelibretti
Istituto Di Struttura Della Materia, Montellibreti
Turchini, Stefano
Italy, Montelibretti
Istituto Di Struttura Della Materia, Montellibreti
Testa, Giovanna
Italy, Rome
Sapienza Università Di Roma
Battocchio, Chiara
Italy, Rome
Università Degli Studi Roma Tre
Proietti Zaccaria, Remo
Italy, Genoa
Istituto Italiano Di Tecnologia
Magnano, Elena
Italy, Trieste
Laboratorio Nazionale Tasc
Pis, Igor
Italy, Trieste
Laboratorio Nazionale Tasc
Italy, Basovizza
Elettra-sincrotrone Trieste S.c.p.a.
Avaldi, Lorenzo
Italy, Rome
Consiglio Nazionale Delle Ricerche
Statistics
Citations: 42
Authors: 11
Affiliations: 7
Identifiers
Doi:
10.1016/j.jcis.2017.11.010
ISSN:
00219797