New insights into colloidal gold flakes: structural investigation, micro-ellipsometry and thinning procedure towards ultrathin monocrystalline layers

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Hoffmann B, Bashouti MY, Feichtner T, Mackovic M, Dieker C, Salaheldin AM, Richter P, Gordan OD, Zahn DRT, Spiecker E, Christiansen S, Hoffmann B
Zeitschrift: Nanoscale
Verlag: Royal Society of Chemistry
Jahr der Veröffentlichung: 2016
Band: 8
Heftnummer: 8
Seitenbereich: 4529-4536
ISSN: 2040-3364


Abstract


High-quality fabrication of plasmonic devices often relies on wet-chemically grown ultraflat, presumably single-crystalline gold flakes due to their superior materials properties. However, important details about their intrinsic structure and their optical properties are not well understood yet. In this study, we present a synthesis routine for large flakes with diameters of up to 70 mu m and an in-depth investigation of their structural and optical properties. The flakes are precisely analyzed by transmission electron microscopy, electron backscatter diffraction and micro-ellipsometry. We found new evidence for the existence of twins extending parallel to the Au flake {111} surfaces which have been found to not interfere with the presented nanopatterning. Micro-Ellipsometry was carried out to determine the complex dielectric function and to compare it to previous measurements of bulk single crystalline gold. Finally, we used focused ion beam milling to prepare smooth crystalline layers and high-quality nanostructures with desired thickness down to 10 nm to demonstrate the outstanding properties of the flakes. Our findings support the plasmonics and nano optics community with a better understanding of this material which is ideally suited for superior plasmonic nanostructures.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Dieker, Christel
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Hoffmann, Björn
Lehrstuhl für Experimentalphysik (Optik)
Mackovic, Mirza Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Spiecker, Erdmann Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)


Zusätzliche Organisationseinheit(en)
Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)
Exzellenz-Cluster Engineering of Advanced Materials
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)


Einrichtungen weiterer Autorinnen und Autoren

Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light
Technische Universität Chemnitz


Forschungsbereiche

C Photonic and Optical Materials
Exzellenz-Cluster Engineering of Advanced Materials
A2 Nanoanalysis and Microscopy
Exzellenz-Cluster Engineering of Advanced Materials
A3 Multiscale Modeling and Simulation
Exzellenz-Cluster Engineering of Advanced Materials


Zitierweisen

APA:
Hoffmann, B., Bashouti, M.Y., Feichtner, T., Mackovic, M., Dieker, C., Salaheldin, A.M.,... Hoffmann, B. (2016). New insights into colloidal gold flakes: structural investigation, micro-ellipsometry and thinning procedure towards ultrathin monocrystalline layers. Nanoscale, 8(8), 4529-4536. https://dx.doi.org/10.1039/c5nr04439a

MLA:
Hoffmann, B., et al. "New insights into colloidal gold flakes: structural investigation, micro-ellipsometry and thinning procedure towards ultrathin monocrystalline layers." Nanoscale 8.8 (2016): 4529-4536.

BibTeX: 

Zuletzt aktualisiert 2019-29-05 um 09:28