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BP: Fachverband Biologische Physik

BP 26: Poster Session II

BP 26.4: Poster

Donnerstag, 29. März 2007, 17:00–19:30, Poster B

Curvature-mediated interactions between membrane-bound particles–analytical results — •Martin Michael Müller¹, Markus Deserno¹, and Jemal Guven² — ¹Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany — ²Instituto de Ciencias Nucleares, UNAM, Apdo. Postal 70-543, 04510 México D. F., Mexico

Membrane-bound particles may interact with each other via the deformations they impose in the lipid bilayer. As the intrinsic nonlinearity of the problem makes it virtually impossible to calculate these interactions analytically, one is typically forced to restrict to linear approximations of the energetics. In some cases this is, however, not necessary.

In this talk, several exact results will be presented that do not rely on any linearizations such as a small gradient assumption. Surface stress and surface torque tensor offer a possibility to determine how the particles interact. Especially for the case of two membrane-bound cylinders (the “1D problem”), that approach can be combined with profile calculations to extract numbers for the strength of interaction.