Regensburg 2013 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 12: Poster: Nanoparticles and Composite Materials

CPP 12.15: Poster

Montag, 11. März 2013, 17:30–19:30, Poster C

Ultrafast strain-mediated response of functionalized polyelectrolyte nanolayers — •Steffen Mitzscherling, Alexander von Reppert, and Matias Bargheer — Universität Potsdam

We prepared layered functional nanostructure samples by spin-assisted layer-by-layer deposition of polyelectrolytes. In analogy to our previous study on spherical gold nanoparticles we show that gold nanorods exhibit even larger spectral shifts and amplitude variations when their dielectric environment is modified.[1,2]

We use the plasmon resonance of the metallic particles to detect ultrashort strain pulses travelling through polymeric layer structures. These hypersound waves are generated by excitation of azobenzene-containing layers. We characterize the strain pulse by ultrafast broadband Brillouin-scattering [3] in order to derive conclusions on the actuation and nonlinear propagation in such complex polymeric nanolayer systems.

[1]Kiel et al., Langmuir, 28, 4800 (2010).

[2]Kiel et al., Langmuir, 26, 18499 (2012).

[3]Bojahr et al., Physical Review B, 86, 144306 (2012).