Regensburg 2013 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 18: Poster: Polymer Dynamics

CPP 18.4: Poster

Dienstag, 12. März 2013, 18:15–20:15, Poster C

Annealing Effects of Thin Polymer Films and Single Chains of Poly(methyl methacrylate) on Various Substrates — •Daniel Geiger, Kirsten Dammertz, Masoud Amirkhani, and Othmar Marti — Institute of Experimental Physics, Ulm University

As previously stated by Guiselin [1], polymer solutions can form an irreversible adsorbed, brush-like layer on a solid interface. Napolitano and Wübbenhorst [2] concluded that the contradictory reports, concerning the dynamics of thin films, are possibly due to the formation of an irreversible adsorbed layer. Therefore, the properties of thin films are strongly dependent of the sample history, in particular of the annealing time and temperature.

The investigation of the influence of different substrates (e. g. silicon and mica) on the formation of the irreversible adsorbed layer is one of the main goals of this work, as well as the study of the temperature dependence of the irreversible adsorbed layer growth process. Furthermore, we study the behavior of single molecules on solid substrates after annealing.

[1] O. Guiselin, Irreversible Adsorption of a Concentrated Polymer Solution, Europhys. Lett., 17, 225-230, 1992

[2] S. Napolitano, M. Wübbenhorst, The lifetime of the deviations from bulk behaviour in polymers confined at the nanoscale, Nat Commun, 2, 260, 2011