Berlin 2018 – scientific programme
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O: Fachverband Oberflächenphysik
O 4: Plasmonics and nanooptics: Fabrication and characterization
O 4.5: Talk
Monday, March 12, 2018, 11:30–11:45, MA 041
Synthesis of atomically flat single crystalline gold platelets for plasmonic applications — •Bettina Frank1, Timothy J. Davis1,2, Frank-J. Meyer zu Heringdorf3, and Harald Giessen1 — 14th Physics Institute and Research Center SCoPE, University of Stuttgart, Germany — 22School of Physics, University of Melbourne, Australia — 3Faculty of Physics and Center of Nanointegration Duisburg-Essen, University of Duisburg-Essen, Germany
We introduce two different methods to produce single crystalline gold platelets. First, we electrochemically create atomically flat single crystalline gold platelets of several tens of micrometers thickness. We investigate their morphology and atomic structure by using AFM, LEEM, and TEM. The second method is a phase transition reaction, where gold ions are transferred to an organic phase which under heating forms single crystalline seeds. After several hours of reaction time single crystalline gold platelets with lateral dimensions of several hundred micrometers are the result. These gold platelets are ideal templates to produce nanostructures via focused ion beam milling. Furthermore, we utilize them for plasmonic applications and demonstrate localized and propagating surface plasmons with EELS and PEEM.