Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

CPP: Fachverband Chemische Physik und Polymerphysik

CPP 24: Responsive and Adaptive Systems I

CPP 24.2: Vortrag

Mittwoch, 20. März 2024, 10:00–10:15, H 0110

Soft matter thin films under pressure: a morphological investigation under Grazing Incidence Scattering — •Apostolos Vagias^1,2, Theodore Manouras^3,4, Andreas Buchner¹, Philipp Gutfreund², Lionel Porcar², Andrew Nelson⁵, Leonardo Chiappisi², David P. Kosbahn⁶, Marcell Wolf¹, Laura Guasco^7,8, Maria Vamvakaki^3,4, and Peter Müller-Buschbaum^1,6 — ¹MLZ, TUM, 85748 Garching, Germany — ²Institut Laue Langevin (ILL), 38000 Grenoble, France — ³Institute of Electronic Structure and Laser, Foundation for Research and Technology Hellas, 700 13 Heraklion, Greece — ⁴Department of Materials Science and Technology, University of Crete, 700 13 Heraklion, Greece — ⁵ANSTO, Lucas Heights, NSW 2234, Australia — ⁶TUM School of Natural Sciences, Chair for Functional Materials, 85748 Garching, Germany — ⁷Max-Planck-Institut für Festkörperforschung, D-70569 Stuttgart, Germany — ⁸Max Planck Society Outstation at the MLZ, D-85748 Garching, Germany

Using a custom-designed pressure cell, we tune hydrostatic pressure and combine Grazing Incidence Small Angle Neutron Scattering (GISANS) with specular and off-specular reflectivity under pressure (P) to probe morphologies of soft matter layers immersed in heavy water at P = 1 bar and P = 800 bar. Our results reveal nanostructural rearrangements upon P-increase for a mixture of strongly segregated (hydrophilic) PDMAEMA and (hydrophobic) POFPMA homopolymer brushes anchored on Si substrate.

Keywords: Grazing Incidence Small Angle Neutron Scattering; high pressure; soft matter; polymer brushes; nanostructure