Berlin 2015 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 43: P8: Nanoparticles and Compsite Materials
CPP 43.7: Poster
Wednesday, March 18, 2015, 10:00–13:00, Poster A
Morphology investigation of self-assembly of metal oxide-diblock copolymer nanocomposite films — •Yuan Yao1, Ezzeldin Metwalli1, Jean-Francois Moulin2, Matthias Opel3, and Peter Müller-Buschbaum1 — 1TU München, Physik Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, Germany — 2HZ Geesthacht at FRM II, Lichtenbergstr.1, 85748 Garching, Germany — 3Walther-Meissner-Institut, Walther-Meissner-Str. 8, 85748 Garching, Germany
The arrangement of maghemite nanoparticles (NPs) in diblock copolymer poly (styrene-d8-block-n-butyl methacrylate) P(Sd-b-BMA) films via a self-assembly process is investigated. This study is motivated by great interests for many potential applications in functional nano-devices. The resulting hybrid thin films show a perforated lamella structure with an enrichment layer containing different NPs concentrations (from 0 up to 15 wt%) as investigated with X-ray reflectometry, scanning electron microscopy, atomic force microscopy, and grazing incidence small angle neutron scattering in time-of-flight mode (TOF-GISANS). The surface modified NPs are selectively positioned in one polymer domain at low NP concentrations and the microphase separation process is even enhanced in this case. However, a distortion of the lamella structure evolves with increasing NP concentrations.