Berlin 2015 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 75: Plasmonics and Nanooptics
O 75.5: Poster
Mittwoch, 18. März 2015, 18:15–21:00, Poster A
Plasmonic Nanoparticles prepared by Nanosphere Lithography for local Excitation of Molecular Aggregates — •Tamam Bohamud1, Mohammadreza Bahrami1, Lukas Steffen Rathje1, J.A.A.W Elemans2, Ingo Barke1, and Sylvia Speller1 — 1University of Rostock, Institute of Physics, 18051 Rostock, Germany — 2Institute for Molecules and Materials, RU Nijmegen, NL
Nanosphere lithography (NSL) is an effective technique to fabricate nanoparticles with tailored arrangement and dimensions. We used this method to obtain periodic arrays of silver nanotriangles using beads of polystyrene as a mask on glass and silicon substrates. Periodic hexagonal arrangements of semi-spherical nanoparticles are created by subsequent annealing. Correlation between the morphology of the nanoparticles and their plasmonic signatures indicate different types of resonances depending on size and shape. The utilization of these nanoparticles as an environment to locally excite copper porphyrin aggregates is discussed.