Regensburg 2022 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 27: Composites and Functional Polymer Hybrids

CPP 27.6: Vortrag

Mittwoch, 7. September 2022, 12:45–13:00, H39

Spatio-temporal Imaging of Programmable Luminescent Tags reveals Planar Oxygen Diffusion Properties in Polymer Films — •Richard Kantelberg, Tim Achenbach, Anton Kirch, and Sebastian Reineke — Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics, Technische Universität Dresden, Germany

Programmable Luminescent Tags based on oxygen quenched organic room temperature phosphorescence show application potential in UV sensing and re-writable labelling. This work demonstrates, that the concept can also be exploited to resolve oxygen diffusion properties in thin polymer films, which are essential in everyday applications from medical encapsulation to industrial packaging. In contrast to many established methods, the investigated principle comes without the need of complex pressure sensitive setups or vacuum technology and potentially allows high spatial accuracy. The time-resolved tracking of a two-dimensional phosphorescent pattern reveals the in-plane oxygen diffusion coefficient and considers the photoconsumption of oxygen during the measurement. The diffusion coefficients are determined at the representative case of polystyrene glasses with molecular weights between 13 000 and 350 000 g/mol.