INVESTIGADORES
MORENO Mario Sergio Jesus
artículos
Título:
Exploring the benefits of electron tomography to characterize the precise morphology of core?shell Au@Ag nanoparticles and its implications on their plasmonic properties
Autor/es:
J.C. HERNANDEZ-GARRIDO; M.S. MORENO; C. DUCATI; L.A. PÉREZ; P.A. MIDGLEY; E.A. CORONADO
Revista:
Nanoscale
Editorial:
The Royal Society
Referencias:
Año: 2014 vol. 6 p. 12696 - 12702
Resumen:
In
the design and engineering of functional core?shell nanostructures, material characterization at small length
scales remains one of the major challenges. Here we show how electron
tomography in highangle annular
dark-field
scanning transmission electron microscopy (HAADF-STEM) mode can be applied successfully
to perform nano-metrological characterization of Au@Ag core?shell nanostructures. This work
stresses the benefits
of HAADF-STEM tomography and its use as a novel and rigorous tool for understanding
the physical?chemical
properties of complex 3D core?shell nanostructures. The reconstructed Au@Ag
core?shell
architecture was used as an input for discrete dipole approximation (DDA)-based
electrodynamics simulations of the optical properties of the nanostructures.
The implications of localized surface plasmon spectroscopy as well as Raman-enhanced
spectroscopy are analysed.