Regensburg 2016 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 15: Poster: Functional Polymer Hybrids

CPP 15.8: Poster

Montag, 7. März 2016, 18:15–21:00, Poster B2

A Comparative Study of Photoinduced Deformation in Azobenzene Containing Polymer Films — •Sarah Loebner, Nataraja Sekhar Yadavalli, and Svetlana Santer — Institute of Physics and Astronomy, University of Potsdam, Germany

Here we report on light induced structuring and deformation of three photosensitive polymers differing in their glass transition temperature. To inscribe surface relief gratings, the polymer films were irradiated with interference pattern of different polarization: intensity interference pattern (IIP) and polarization interference pattern (PIP). The irradiation was conducted in-situ while simultaneously acquiring the topography change with AFM. The polymers show comparable kinetic of topography change and maximally attainable grating height under irradiation with IIP. The illumination with PIP results in larger grating height for all three polymers, but more pronounce topography change was found for the polymers of larger glass transition temperature.
We have also performed experiments where a rectangular piece of polymer film was cut out of the film using AFM lithography and irradiated with homogeneous light of linear polarization. For all three polymers we have found that the rectangular piece elongates along the electrical field vector and contracts in perpendicular direction.