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You are here: Home Events Dr. Falko Ziebert "On unstable thin polymer films and membranes"

Dr. Falko Ziebert "On unstable thin polymer films and membranes"

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Experimental Polymer Physics, Physikalisches Institut, Albert-Ludwigs-Universität Freiburg

What
  • Seminar
When Jan 19, 2011
from 02:15 PM to 03:00 PM
Where “Hörsaal Makromolekulare Chemie”, Stefan-Meier-Str. 31, Freiburg
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http://www.tp1.physik.uni-bayreuth.de/de/team/3_postdoc/Ziebert_Falko/index.html

Abstract

I discuss several aspects of unstable films and membranes. In the first part I will describe how the dewetting of thin polymer films made by spin-casting can be described by a thin film model. Aspects that have to be taken into account to understand recent experimental results are viscoelasticity, nonlinearity of friction with the substrate and residual stresses inside the film. The latter are due to the frozen-in nonequilibrium configurations caused by the rapid solvent evaporation during spin coating. In the second part I discuss the instability of a lipid membrane in an electric field. This is important to understand e.g. electroformation of vesicles or electroporation. I also briefly discuss the related instability of a thin polymer film in an electric field.


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