Dresden 2026 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 31: Responsive and Adaptive Systems
CPP 31.6: Vortrag
Mittwoch, 11. März 2026, 11:00–11:15, ZEU/0255
Impact of surface chemistry on the adsorption and dynamics of stimuli-responsive polymers — Baptiste Chabaud1, Wanchung Chiang1, Lionel Bureau1, Ralf Richter2, Rachel Auzély1, Delphine Debarre1, and •Galina Dubacheva1 — 1Université Grenoble Alpes, Grenoble, France — 2University of Leeds, Leeds, UK
Stimuli-responsive polymers at interfaces underpin smart coatings, sensors and bioinspired materials, yet how surface chemistry controls their binding and dynamics remains poorly understood. We probe the interfacial behavior of redox- and thermosensitive polymers on well-defined model surfaces using QCM-D, SPR, ellipsometry, electrochemistry and fluorescence microscopy. For redox-active host/guest systems, we show that grafting strategy, linker flexibility and host/guest density govern the stability, specificity and reversibility of polymer assemblies. Kinetic analysis further reveals that small changes in surface chemistry, such as linker design or dilution with inert molecules, strongly tune multivalent superselectivity, enabling sharp discrimination of receptor densities. Using supported lipid bilayers as fluid interfaces, we correlate lateral mobility with contraction, dehydration and 2D aggregation of thermoresponsive polymer brushes. Overall, we identify interfacial density, mobility and flexibility as key parameters for controlling stimuli-responsive polymer assemblies and outline design rules for supramolecular and bio-inspired systems with high specificity and precision.
Keywords: redox-responsive host/guest assemblies; thermoresponsive polymers; functional interfaces; multivalency