Dresden 2014 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 37: Poster Session 2
CPP 37.37: Poster
Mittwoch, 2. April 2014, 15:00–19:00, P3
PPMA-PMMA block copolymer thin films with modified gold nanoparticles — •Dieter Jehnichen1, Doris Pospiech1, Guping He1, Peter Friedel1, Jianqi Zhang2, Christine M. Papadakis2, and Jan Perlich3 — 1Leibniz-Institut für Polymerforschung Dresden e.V. — 2Technische Universität München, Physik-Department, Garching — 3DESY Photon Science, Hamburg
Diblock copolymers show phase separation on mesoscopic length scales and form a wealth of ordered morphologies in both bulk and thin films resulting in nanostructured polymer surfaces. These may serve as templates for the controlled assembly of nanoparticles.
We investigate diblock copolymers from poly(n-pentyl methacrylate) and poly(methyl methacrylate), P(PMA-b-MMA) having different block lengths and compositions. In bulk, they form lamellae or hexagonally packed cylinders [1]. For film thicknesses lower than the repeat distance of the bulk morphology, standing cylinders are observed using atomic force microscopy and grazing-incidence small-angle X-ray scattering. In contrast, for higher film thicknesses, lying cylinders are found. Gold nanoparticles assemble at the interfaces and result in some cases in severe changes of the thin film structure.
1. D. Jehnichen et al., Z. Kristallogr. Suppl. 30, 485 (2009).