title: Plasmon Mapping in Au@Ag Nanocube Assemblies.
abstract: Surface plasmon modes in metallic nanostructures largely determine their optoelectronic properties. Such plasmon modes can be manipulated by changing the morphology of the nanoparticles or by bringing plasmonic nanoparticle building blocks close to each other within organized assemblies. We report the EELS mapping of such plasmon modes in pure Ag nanocubes, Au@Ag core-shell nanocubes, and arrays of Au@Ag nanocubes. We show that these arrays enable the creation of interesting plasmonic structures starting from elementary building blocks. Special attention will be dedicated to the plasmon modes in a triangular array formed by three nanocubes. Because of hybridization, a combination of such nanotriangles is shown to provide an antenna effect, resulting in strong electrical field enhancement at the narrow gap between the nanotriangles.
authors: EMAT, University of Antwerp , Groenenborgerlaan 171, 2020 Antwerp, Belgium.
authors: Bart
authors: B
authors: Goris
authors: EMAT, University of Antwerp , Groenenborgerlaan 171, 2020 Antwerp, Belgium.
authors: Giulio
authors: G
authors: Guzzinati
authors: Departamento de Química Física, Universidade de Vigo , 36310 Vigo, Spain.
authors: Cristina
authors: C
authors: Fernández-López
authors: Departamento de Química Física, Universidade de Vigo , 36310 Vigo, Spain.
authors: Jorge
authors: J
authors: Pérez-Juste
authors: Departamento de Química Física, Universidade de Vigo , 36310 Vigo, Spain ; BioNanoPlasmonics Laboratory, CIC biomaGUNE , Paseo de Miramón 182, 20009 Donostia - San Sebastián, Spain ; Ikerbasque, Basque Foundation for Science, 48011 Bilbao, Spain.
authors: Luis M
authors: LM
authors: Liz-Marzán
authors: Institut für Physik, Karl-Franzens-Universität Graz , Universitätsplatz 5, 8010 Graz, Austria.
authors: Andreas
authors: A
authors: Trügler
authors: Institut für Physik, Karl-Franzens-Universität Graz , Universitätsplatz 5, 8010 Graz, Austria.
authors: Ulrich
authors: U
authors: Hohenester
authors: EMAT, University of Antwerp , Groenenborgerlaan 171, 2020 Antwerp, Belgium.
authors: Jo
authors: J
authors: Verbeeck
authors: EMAT, University of Antwerp , Groenenborgerlaan 171, 2020 Antwerp, Belgium.
authors: Sara
authors: S
authors: Bals
authors: EMAT, University of Antwerp , Groenenborgerlaan 171, 2020 Antwerp, Belgium.
authors: Gustaaf
authors: G
authors: Van Tendeloo