Berlin 2024 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 7: Composites and Functional Polymer Hybrids II
CPP 7.1: Vortrag
Montag, 18. März 2024, 15:00–15:15, H 0106
Tracking the morphology evolution of functional magnetic hybrid diblock copolymer-nanoparticle thin films by in situ GISAXS — •Christopher R. Everett1, Guangjiu Pan1, Manuel A. Reus1, David P. Kosbahn1, Aidin Lak2, Frank Hartmann3, Martin Bitsch3, Markus Gallei3, Matthias Opel4, Matthias Schwartzkopf5, and Peter Müller-Buschbaum1,6 — 1TUM School of Natural Sciences, Chair for Functional Materials, 85748 Garching — 2TU Braunschweig, Institute for Electrical Measurement Science and Fundamental Electrical Engineering, 38106 Braunschweig, Germany — 3Saarland University, LS Polymer Chemistry, 66123 Saarbrücken, Germany — 4Walther-Meissner-Insitut, Bayerische Akademie der Wissenschaften, 85748 Garching — 5DESY, 22607 Hamburg — 6MLZ, TUM, 85748 Garching
Binary diblock copolymer-nanoparticle (DBC-NP) composites are well-established materials with significant research focused on controlling the localization of the nanoparticles into one particular polymer domain. Using this knowledge as a foundation, we investigate the fabrication of ternary DBC-NP-NP composites with two distinct types of NPs. Thin hybrid films composed of PS-b-PMMA, cobalt ferrite (CoFe2O4) NPs, and nickel oxide (NiO) NPs are fabricated by a slot-die coating technique. NP segregation during the drying process is investigated with grazing incidence small-angle X-ray scattering (GISAXS). The magnetic properties of the films are probed with a SQUID magnetometer and the ternary films show enhanced magnetic coercivity and remanence compared to the single-NP films.
Keywords: thin films; diblock copolymers; magnetic nanoparticles; GISAXS