Dresden 2020 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 17: Interfaces and Thin Films I (joint session CPP/DY/O)

DY 17.2: Vortrag

Montag, 16. März 2020, 16:45–17:00, ZEU 260

In situ GISAXS Investigations of Multi-responsive Block Copolymer Thin Films during Solvent Vapor Annealing — •Florian A. Jung¹, Panayiota A. Panteli², Detlef-M. Smilgies³, Dorthe Posselt⁴, Constantinos Tsitsilianis⁵, Costas S. Patrickios², and Christine M. Papadakis¹ — ¹Physics Department, Soft Matter Group, Technical University of Munich, Garching, Germany — ²Department of Chemistry, University of Cyprus, Nicosia, Cyprus — ³Wilson Laboratory, Cornell University, Ithaca, USA — ⁴Department of Science and Environment, Roskilde University, Denmark — ⁵Department of Chemical Engineering, University of Patras, Greece

Responsive block copolymer thin films are of interest for many applications, e.g. as fast sensors or switchable membranes. In the present work, we investigate a pH and temperature responsive pentablock quaterpolymer in thin films during solvent vapor annealing (SVA). The end blocks are temperature-responsive and hydrophobic while the midblock is pH-responsive and hydrophilic. Structural information was obtained by employing in situ grazing-incidence small-angle X-ray scattering (GISAXS) and by model fitting the obtained 2D patterns. We find that, varying the pH value of the solution for spin-coating as well as the nature of the solvent used for SVA gives the opportunity to tune the structures in a wide range.