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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 35: Poster Session II
CPP 35.19: Poster
Wednesday, March 29, 2023, 11:00–13:00, P1
Morphology transformation pathway of block copolymer- directed cooperative self-assembly of ZnO hybrid films monitored in situ during slot-die coating — •Ting Tian1, Shanshan Yin1, Suo Tu1, Christian L. Weindl1, Kerstin S. Wienhold1, Suzhe Liang1, Matthias Schwartzkopf2, Stephan Volkher Roth2, and Peter Müller-Buschbaum1,3 — 1Technical University of Munich, TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, 85748 Garching — 2James-Franck-Str. 1 — 3MLZ, TUM, 85748 Garching
Co-assembly of diblock copolymers (DBCs) and inorganic precursors that takes inspiration from the rich phase separation behavior of DBCs can enable the realization of a broad spectrum of functional nanostructures with the desired sizes. In a DBC assisted sol*gel chemistry approach with polystyrene-block-poly(ethylene oxide) and ZnO, hybrid films are formed with slot-die coating. Pure DBC films are printed as control. In situ grazing-incidence small-angle X-ray scattering (GISAXS) measurements are performed to investigate the self-assembly and co-assembly process during the film formation. Combining complementary ex situ characterizations, several distinct regimes are differentiated to describe the morphological transformations from the initially solvent-dispersed to the ultimately solidified films. The precursor reduces the degree of order, prevents crystallization of the poly(ethylene oxide) block, and introduces additional length scales in the hybrid films.