title: Controlled Living Nanowire Growth: Precise Control over the Morphology and Optical Properties of AgAuAg Bimetallic Nanowires.
abstract: Inspired by the concept of living polymerization reaction, we are able to produce silver-gold-silver nanowires with a precise control over their total length and plasmonic properties by establishing a constant silver deposition rate on the tips of penta-twinned gold nanorods used as seed cores. Consequently, the length of the wires increases linearly in time. Starting with ∼210 nm × 32 nm gold cores, we produce nanowire lengths up to several microns in a highly controlled manner, with a small self-limited increase in thickness of ∼4 nm, corresponding to aspect ratios above 100, whereas the low polydispersity of the product allows us to detect up to nine distinguishable plasmonic resonances in a single colloidal solution. We analyze the spatial distribution and the nature of the plasmons by electron energy loss spectroscopy and obtain excellent agreement between measurements and electromagnetic simulations, clearly demonstrating that the presence of the gold core plays a marginal role, except for relatively short wires or high-energy modes.
authors.affiliation: †Physical Chemistry II, University of Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Mayer
authors.affiliation: ‡CIC biomaGUNE, Paseo de Miramón 182, 20009 Donostia-San Sebastián, Spain.
authors.forename: Leonardo
authors.initials: L
authors.lastname: Scarabelli
authors.affiliation: §Laboratoire de Physique des Solides CNRS/UMR8502, University Paris-Sud, Bâtiment 510, Orsay 91405, France.
authors.forename: Katia
authors.initials: K
authors.lastname: March
authors.affiliation: ∥EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium.
authors.forename: Thomas
authors.initials: T
authors.lastname: Altantzis
authors.affiliation: †Physical Chemistry II, University of Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany.
authors.forename: Moritz
authors.initials: M
authors.lastname: Tebbe
authors.affiliation: §Laboratoire de Physique des Solides CNRS/UMR8502, University Paris-Sud, Bâtiment 510, Orsay 91405, France.
authors.forename: Mathieu
authors.initials: M
authors.lastname: Kociak
authors.affiliation: ∥EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium.
authors.forename: Sara
authors.initials: S
authors.lastname: Bals
authors.affiliation: ⊥ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain.|∇ICREA-Institució Catalana de Recerca i Estudis Avançats, Passeig Lluís Companys, 23, 08010 Barcelona, Spain.
authors.forename: F Javier
authors.initials: FJ
authors.lastname: García de Abajo
authors.affiliation: †Physical Chemistry II, University of Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Fery
authors.affiliation: ‡CIC biomaGUNE, Paseo de Miramón 182, 20009 Donostia-San Sebastián, Spain.|¶Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain.
authors.forename: Luis M
authors.initials: LM
authors.lastname: Liz-Marzán
mesh_terms: D006046:Gold / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D053770:Nanowires / Q000737:chemistry* / Q000648:ultrastructure; D012834:Silver / Q000737:chemistry*; D020349:Surface Plasmon Resonance / Q000379:methods
chemical_list: D012834:Silver; D006046:Gold
keywords: bimetallic; gold; nanoplasmonics; nanowires; silver; synthesis