Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 21: Focus: Smart Hydrogels and Hydrogel Based Devices I - organized by Gerald Gerlach, Walter Richtering and Thomas Hellweg
CPP 21.6: Vortrag
Dienstag, 13. März 2018, 11:15–11:30, C 130
Film-coupled plasmonic arrays based on core-shell microgel particles — •Yannic Brasse1, Mareen B. Müller2, Matthias Karg3, Christian Kuttner1,4, Tobias A. F. König1,4, and Andreas Fery1,4 — 1Leibniz-Institut für Polymerforschung Dresden e.V., Institute of Physical Chemistry and Polymer Physics, Hohe Str. 6, 01069 Dresden, Germany — 2Physical Chemistry II, University of Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany — 3Department of Physical Chemistry 1, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany — 4Cluster of Excellence Center for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, 01062 Dresden, Germany
We study the optical properties of a metal-film-coupled gold nanoparticle system, separated by a Poly(N-isopropylacrylamide) (PNIPAM) layer, as cost-efficient and scalable platform for screening of plasmonic properties. As shown in earlier work, a monolayer of gold-core/PNIPAM-shell particles featuring a gradient in core-sizes, results in lateral variation of plasmonic resonances.[1] Coverage with a 35 nm gold layer induces plasmonic coupling between cores and the film. We study the tunability of the array by swelling of PNIPAM for various particle sizes, which reveals a reversible plasmonic shift of up to 40 nm. With this lithography-free method we produce a platform for systematic screening of fundamental optical effects and for application in surface plasmon resonance (SPR) sensing.[2]
[1] M.B. Müller et al., ACS Nano, 2014, 8, 9410 [2] Funding from ERC Starting Grant METAMECH-306686 is acknowledged