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Effects of nanoparticles on phase morphology in thin films of phase-separated diblock copolymers

Published online by Cambridge University Press:  30 January 2017

Dieter Jehnichen ,
Doris Pospiech ,
Peter Friedel ,
Andriy Horechyy ,
Andreas Korwitz ,
Andreas Janke ,
Franziskus Näther ,
Christine M. Papadakis ,
Jan Perlich  and
Volker Neu
Dieter Jehnichen*
Affiliation:
Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, D-01069 Dresden, Germany
Doris Pospiech
Affiliation:
Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, D-01069 Dresden, Germany
Peter Friedel
Affiliation:
Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, D-01069 Dresden, Germany
Andriy Horechyy
Affiliation:
Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, D-01069 Dresden, Germany
Andreas Korwitz
Affiliation:
Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, D-01069 Dresden, Germany
Andreas Janke
Affiliation:
Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, D-01069 Dresden, Germany
Franziskus Näther
Affiliation:
Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, D-01069 Dresden, Germany Actual Address: Wacker Chemie AG, D-01612, Nünchritz, Germany
Christine M. Papadakis
Affiliation:
Technische Universität München, Physik-Department, James-Franck-Str. 1, D-85748 Garching, Germany
Jan Perlich
Affiliation:
Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, D-22607 Hamburg, Germany Actual Address: Continental Reifen Deutschland GmbH, D-30165 Hannover, Germany
Volker Neu
Affiliation:
Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V., Institut für Metallische Werkstoffe, Helmholtzstr. 20, D-01069 Dresden, Germany
*
a)Author to whom correspondence should be addressed. Electronic mail: [email protected]
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Abstract

This study investigates the morphology changes in thin diblock copolymer (DiBCP) films occurring in the interaction with modified nanoparticles (NPs). Magnetite (Fe3O4) and silica (SiOx) were prepared and used. Poly(pentyl methacrylate-b-methyl methacrylate) (PPMA-b-PMMA) (70/30 mol mol−1, hcp cylinders of the PMMA phase) DiBCP were employed to prepare thin films having thicknesses to realize standing cylinders in pure DiBCP films. The investigations aimed at two topics: (1) morphology after controlled incorporation of organo-modified NP (gold, silver, Fe3O4, SiOx) and (2) additional solvent vapour annealing (SVA) with tetrahydrofuran (and chloroform for comparison). The laterally ordered morphology in thin films was examined by GISAXS and atomic force microscopy. Keeping the same type of morphology in nanocomposites, the dimensions of the periodic nanostructure altered depending on type and amount of incorporated NP. It was found that SiOx clusters enlarge the lateral distance of the PMMA cylinders, whereas metallic NPs reduce this parameter. Applying SVA improves the phase separation slightly, whereas lateral distances were kept constant or were reduced a little. Switching of domain orientation upon SVA could not be detected in the presence of NPs located at the polymer/substrate interface.

Keywords

X-ray scatteringnanocompositesnanoparticlesdiblock copolymersthin films
Type
Technical Articles
Information
Powder Diffraction , Volume 32 , Supplement S1 , September 2017 , pp. S141 - S150
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Copyright
Copyright © International Centre for Diffraction Data 2017 

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