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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 13: Composites and Functional Polymer Hybrids

CPP 13.8: Talk

Monday, March 27, 2023, 17:15–17:30, ZEU 255

Morphology evolution and nanoparticle localization in printed hybrid nanoparticle-diblock copolymer thin films investigated by in situ GISAXS — •Christopher R. Everett¹, Guangjiu Pan¹, Manuel A. Reus¹, David Kosbahn¹, Frank Hartmann², Martin Bitsch², Matthias Opel³, Markus Gallei², Matthias Schwartzkopf⁴, and Peter Müller-Buschbaum^1,5 — ¹TUM, TUM School of Natural Sciences, Chair for Functional Materials, 85748 Garching — ²Saarland University, LS Polymer Chemistry, 66123 Saarbrücken — ³Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching — ⁴DESY, 22607 Hamburg — ⁵MLZ, TUM, 85748 Garching

The diblock copolymer (DBC) PS-b-PMMA forms films with periodic ordered nanostructures that can act as scaffolds for inorganic magnetic nanoparticles. These films have application as magnetic sensors and in magnetic data storage devices. Film formation and the resulting magnetic properties both depend on the localization of the nanoparticles in the DBC domains. In this investigation, ultra-high molecular weight PS-b-PMMA films containing two types of nanoparticles, cobalt ferrite and nickel, are fabricated by a slot-die coating technique. Grazing incidence small-angle X-ray scattering (GISAXS) is used to monitor in situ the morphological evolution of the DBC films and nanoparticle segregation in the films during the deposition and drying process. The magnetic properties of the hybrid films are investigated with a SQUID magnetometer.