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Materials 2012, 5(10), 1923-1932; doi:10.3390/ma5101923

Lateral Dynamics in Polymer-Supported Membranes

1,* , 2
1 Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University, Tokyo 192-0397, Japan 2 Polymer Physics Group, Department of Physics, Free University of Brussels, Campus Plaine, CP 223, Brussels 1050, Belgium 3 National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki 305-8565, Japan
* Author to whom correspondence should be addressed.
Received: 11 September 2012 / Revised: 30 September 2012 / Accepted: 12 October 2012 / Published: 19 October 2012
(This article belongs to the Special Issue Supported Lipid Membranes)
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We investigate the lateral dynamics in a purely viscous lipid membrane which is supported by a thin polymer sheet (polymer-supported membrane). The generalized frequency-dependent mobility tensor of the polymer-supported membrane is obtained by taking into account the viscoelasticity of the polymer sheet. Due to its viscoelasticity, the cross-correlation functions of two particles embedded in the membrane exhibit an anomalous diffusion. A useful relation for two-point microrheology connecting the cross-correlation function and the modulus of the polymer sheet is provided.
Keywords: supported membranes; lipids; viscoelasticity; diffusion; microrheology supported membranes; lipids; viscoelasticity; diffusion; microrheology
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Komura, S.; Ramachandran, S.; Seki, K. Lateral Dynamics in Polymer-Supported Membranes. Materials 2012, 5, 1923-1932.

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