Recubrimiento controlado de sustratosde vidrio con nanobastones metálicos

AUTOR(ES)

Gutiérrez, Marina Verónica, Paredes, María Yanela, Scarpettini, Alberto Franco

FONTE

Matéria (Rio J.)

DATA DE PUBLICAÇÃO

2015-09

RESUMO

ABSTRACTMonodispersed gold nanorods were synthesized with efficiency above 80% of all nanoparticles, characterized by longitudinal plasmon resonance around 800 nm. Glass substrates were surface modified and covered with the synthesized nanorods with control of surface density. Coverage dynamics was monitored through extinction spectra, and a saturation maximum density was observed, given by electrostatic repulsion, and a characteristic time of the process. A widening of the resonance towards the infrared is observed after reaching the saturation of nanorods per unit area, due to interactions between nanorods on account of surface aggregation. These results have immediate application in the design and manufacture of plasmonic devices, for example in molecular sensing.

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