Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 59: Photonics and Nanooptics III: Fabrication and Characterization
O 59.8: Vortrag
Mittwoch, 9. März 2016, 16:45–17:00, S051
Plasmonic Coupling in Core/Satellite Nanoclusters — •Christian Kuttner1,2, Roland Höller1,2, Martin Dulle3, Sabrina Thomä2, Martin Mayer1, Stephan Förster3, Andreas Fery1,2, and Munish Chanana2,4 — 1Nanostructured Materials, Leibniz Institute of Polymer Research, 01069 Dresden, Germany — 2Physical Chemistry II, University of Bayreuth, 95440 Bayreuth, Germany — 3Physical Chemistry I, University of Bayreuth — 4Institute of Building Materials, ETH Zürich, 8093, Zürich, Switzerland
We present the fundamental coupling scenarios in core/satellite nanoclusters prepared from colloidal assembly of small spherical gold or silver NPs (as satellites) onto larger gold NPs (as cores). The resulting dispersions exhibit high colloidal stability and allowed for the precise characterization of the core/satellite architecture in dispersion by small-angle X-ray scattering (SAXS).
Strong near-field coupling between the building blocks results in distinct regimes of dominant satellite-to-satellite and core-to-satellite coupling. High robustness against satellite disorder was proved by UV/Vis diffuse reflectance (integrating sphere) measurements. Generalized multi particle Mie theory (GMMT) simulations were employed to describe the electromagnetic coupling within the nanoassemblies.
Roland P. M. Höller et al., 2015 (submitted).