Dresden 2014 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 54: Poster Session 3
CPP 54.78: Poster
Donnerstag, 3. April 2014, 15:00–19:00, P2
Plasmonic nanoparticle assemblies with controllable plasmon resonance coupling — •Tobias Honold1, Mareen Müller2, Andreas Fery2, and Matthias Karg1 — 1Physical Chemistry I, University of Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany — 2Physical Chemistry II, University of Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany
Surface plasmon resonances are collective oscillations of the electron gas at a metal surface which can be excited by electromagnetic radiation. These resonances become localized when the size of the metal object is reduced down to the nanoscale. The energy of this localized surface plasmon resonance (LSPR) depends strongly on the particle size, shape, the dielectric environment and on the metal itself. In addition, LSPRs are sensitive to the inter-particle distance. When two plasmonic nanoparticles approach each other coupling of the resonances occurs and the optical properties of the system can change significantly. In this contribution we show how we make use of this distance dependent coupling behavior in order to create plasmonic surfaces with tailored optical properties. In our approach we coat the plasmonic nanoparticles with polymer shells which then act as a steric spacer during particle assembly. These core-shell particles can nicely be assembled to form hexagonal close-packed monolayer or more complex structures such as linear assemblies realized through wrinkle-assisted assembly. The inter-particle separation is controlled by the thickness of the polymer shell and hence plasmon resonance coupling becomes controllable