63858 2025 eng lecture 0 -- -- -- Thin polymer films play a crucial role in modern technologies, with applications spanning flexible electronics, membranes, coatings, and nanodevices. Their reduced dimensions result in unique physical behavior, often deviating significantly from bulk properties due to confinement and interfacial effects. In this study, we investigate how nanoscale confinement and polymer–substrate interactions influence the structural and dynamic properties of supported thin films of two rigid-backbone polymers: poly(bisphenol A carbonate) (PBAC) and polysulfone (PSU). Emphasis was placed on the development of adsorbed interfacial layers, molecular mobility, and the glass transition behavior as functions of film thickness and thermal history. Using a multimodal experimental approach—including Atomic Force Microscopy (AFM), Broadband Dielectric Spectroscopy (BDS), Differential and Fast Scanning Calorimetry (DSC, FSC), and Ellipsometry—we characterized adsorption kinetics, desorption processes, and segmental dynamics across a wide range of thicknesses and annealing conditions. Special attention was given to the formation and growth regimes of the adsorbed polymer layers, including a newly observed pre-growth stage, and their effect on thermal and dielectric relaxation behavior. To probe dynamics in ultrathin films, two dielectric electrode configurations—crossed electrode capacitors and nanostructured electrodes—were employed, enabling measurements down to 10 nm and isolated adsorbed layer. This comprehensive analysis provides insight into how one-dimensional confinement and interfacial interactions modulate macromolecular behavior, which is critical for the design of functional nanostructured polymeric systems in advanced applications. 10th International Discussion Meeting on Relaxations in Complex Systems (10thIDMRCS) Barcelona, Spanien 20.06.2025 0 publish false true Paulina Szymoniak eng uncontrolled Thin films Ingenieurwissenschaften und zugeordnete Tätigkeiten 6 Materialchemie 6.1 Oberflächen- und Dünnschichtanalyse Material Datei im Netzwerk der BAM verfügbar ("Closed Access") Präsentation Advanced Materials