Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 59: Photonics and Nanooptics III: Fabrication and Characterization
O 59.11: Vortrag
Mittwoch, 9. März 2016, 17:30–17:45, S051
Controlled Living Nanowire Growth: Precise Control over the Morphology and Optical Properties of AgAuAg Nanowires — •Martin Mayer1, Leonardo Scarabelli2, Katia March3, Thomas Altantzis4, Moritz Tebbe5, Mathieu Kociak3, Sara Bals4, F. Javier García de Abajo6, Luis M. Liz-Marzán2, and Andreas Fery1 — 1Leibniz Institute of Polymer Research, Dresden, Germany — 2CIC biomaGUNE, Donostia, Spain — 3Laboratoire de Physique des Solides, University Paris-Sud, Orsay, France — 4EMAT, University of Antwerp, Antwerp, Belgium — 5Physical Chemistry II, University of Bayreuth, Bayreuth, Germany — 6Institut de Ciencies Fotoniques, Barcelona, Spain
Inspired by the concept of living polymerization reaction, we are able to produce bimetallic noble metal nanowires with a precise control over their morphology and plasmonic properties. By establishing a constant silver deposition rate on the tips of pentatwinned gold nanorods used as seed cores, the lengths of the AgAuAg nanowires increases linearly in time with nanometer control.
Due to the extraordinary low polydispersity of the resulting nanowires, plasmonic modes up to the 8th order can clearly distinguished in UV–vis/NIR spectroscopy of colloidal solutions.
We analyze the spatial distribution and the nature of the plasmons on the single nanowire level by electron energy loss spectroscopy and obtain excellent agreement between measurements and electromagnetic simulations. This procedure opens up new possibilities for the exploitation of plasmon resonances in the near and mid IR regions.