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MM: Fachverband Metall- und Materialphysik
MM 26: Poster session II
MM 26.5: Poster
Tuesday, March 8, 2016, 18:30–20:30, Poster B3
Structural and optical investigation of colloidal gold platelets for high-quality plasmonic applications — •Björn Hoffmann1, Muhammad Bashouti1, Thorsten Feichtner2,1, Mirza Mačković3, Christel Dieker3, Ahmed Salaheldin4, Peter Richter5, Ovidiu Gordan5, Dietrich Zahn5, Erdmann Spiecker3, and Silke Christiansen2,1 — 1Max Planck Institute for the Science of Light, 91058 Erlangen — 2Helmholtz Zentrum Berlin für Materialien und Energie GmbH, D-14109 Berlin — 3Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Lehrstuhl für Mikro- und Nanostrukturforschung (WW9) & Center for Nanoanalysis and Electron Microscopy, Department Werkstoffwissenschaften, 91058 Erlangen — 4FAU Erlangen-Nürnberg, Institute of Particle Technology, 91058 Erlangen — 5Semiconductor Physics, Technische Universität Chemnitz, 09107 Chemnitz
Wet-chemically synthesized ultraflat gold platelets are an ideal building block for high-quality plasmonic applications. They show superior properties compared to vapor-deposited gold layers and enable yet unknown fabrication precision. Even though gold platelets are already frequently used in the field of plasmonics, many details about their intrinsic structure as well as their optical properties are still unknown.
Here, we present a detailed TEM study that proves the existence of twin boundaries inside the particles. Furthermore, we have determined the complex dielectric function of single gold platelets by using micro-ellipsometry. To demonstrate the outstanding quality of this material, we prepared ultrathin, single-crystalline layers as thin as 15 nm.