Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 33: Poster Session III
CPP 33.31: Poster
Dienstag, 13. März 2018, 14:00–16:00, Poster C
Mechano-Responsive Polymer Structures for Sensing Forces — •Jens W. Neubauer1, Nicolas Hauck1, Julian Thiele1, and Andreas Fery1,2 — 1Leibniz-Institut für Polymerforschung Dresden e.V., Germany — 2Chair of Physical Chemistry of Polymeric Materials, Technische Universität Dresden, Germany
We design mechano-responsive polymer structures for spatially resolved force sensing. Local deformations of the polymer cause localized changes in the fluorescence of labelled dyes. Hence, the deformations can be correlated with the mechanical properties of the polymer structure.
Recently, we applied a mechano-responsive polyelectrolyte brush to resolve the stress distributions in the contact area of gecko-inspired microstructures. The polyelectrolyte brush carried permanent cationic charges which could quench the fluorescence of the labelled dye. Accordingly, compressive and tensile stresses could be read out from locally decreased and increased fluorescence intensity, respectively. In earlier work, the sensitivity upon compression was determined to 10 kPa with a spatial resolution better than human skin (1 µm).
As the polymer brush layers are limited in geometry, we aim for extending the responsiveness to three-dimensional polymer networks. For this purpose, we utilize droplet microfluidics.
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