Dresden 2017 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 15: Poster: Membranes, Biomaterials, Biopolymers
CPP 15.12: Poster
Montag, 20. März 2017, 18:30–21:00, P1C
Controlled Assembly of Plasmonic Core/Satellite Nanostructures for Efficient SERS Enhancement — •Roland Höller1, Izabella Jahn2, Martin Dulle3, Dana Cialla-May2, Martin Mayer1,5, Stephan Förster3, Jürgen Popp2, Munish Chanana4, Christian Kuttner1,5, and Andreas Fery1,5 — 1Leibniz Institute of Polymer Research, 01069 Dresden, Germany — 2Leibniz Institute of Photonic Technology, 07745 Jena, Germany — 3Physical Chemistry I, University of Bayreuth, 95440 Bayreuth, Germany — 4Institute of Building Materials, ETH Zürich, 8093 Zürich, Switzerland — 5Cluster of Excellence Centre for Advancing Electronics Dresden (cfaed) and Technische Universität Dresden, 01062 Dresden, Germany
We present a novel protein-assisted self-assembly route of small spherical gold or silver NPs (as satellites) with a hydrophilic protein corona onto larger gold NPs (as cores) into three-dimensional nanoassemblies with core/satellite architecture in dispersion. Their interparticular gaps represent hot spots for surface-enhanced Raman scattering (SERS) detection. The highly modular bottom-up fabrication of homo- and heterometallic core/satellite combinations allows for tailored plasmonics. A precise characterization of the morphology in dispersion was achieved using small-angle X-ray scattering (SAXS). By combining the results from SAXS, UV/Vis spectroscopy, and electromagnetic simulations we were able to correlate the structural parameters with the plasmonic coupling within the core/satellite nanoclusters.
[1] Höller, R.P.M. et al., ACS Nano 2016, 10, 5740-5750.