TY  - JOUR
AU  - Jehnichen, Dieter
AU  - Pospiech, Doris
AU  - Friedel, Peter
AU  - Horechyy, Andriy
AU  - Korwitz, Andreas
AU  - Janke, Andreas
AU  - Näther, Franziskus
AU  - Papadakis, Christine M.
AU  - Perlich, Jan
AU  - Neu, Volker
TI  - Effects of nanoparticles on phase morphology in thin films of phase-separated diblock copolymers
JO  - Powder diffraction
VL  - 32
IS  - S1
SN  - 1945-7413
CY  - Cambridge
PB  - Cambridge Univ. Press
M1  - PUBDB-2017-14139
SP  - S141 - S150
PY  - 2017
AB  - This study investigates the morphology changes in thin diblock copolymer (DiBCP) films occurring in the interaction with modified nanoparticles (NPs). Magnetite (Fe<sub>3</sub>O<sub>4</sub>) and silica (SiO <sub>x</sub> ) 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, Fe<sub>3</sub>O<sub>4</sub>, SiO <sub>x</sub> ) 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 SiO <sub>x</sub> 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000410195100023
DO  - DOI:10.1017/S0885715616000762
UR  - https://bib-pubdb1.desy.de/record/398579
ER  -