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Anomalous Diffusion in Membranes

Published online by Cambridge University Press:  10 February 2011

R. Granek,
S. Pierrat and
A. G. Zilman
R. Granek
Affiliation:
Department of Materials and Interfaces Weizmann Institute of Science Rehovot 76100, Israel
S. Pierrat
Affiliation:
Department of Materials and Interfaces Weizmann Institute of Science Rehovot 76100, Israel
A. G. Zilman
Affiliation:
Department of Materials and Interfaces Weizmann Institute of Science Rehovot 76100, Israel
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Abstract

We study the undulations and the transverse diffusion of a tagged membrane point in both physical (passive) membranes and active biomembranes. In physical membranes thermal undulations generate a transverse subdiffusive motion, 〈r 2〉 ∼ t 2/3. Active biomembranes include active sites that use chemical energy to pump ions or molecules from one side to the other. In this case we find a few regimes which show a strongly enhanced diffusion, 〈r 2〉 ∼ t α with 1 < α > 2.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 543: Symposium W – Dynamics in Small Confining Systems IV , 1998, 103
Copyright
Copyright © Materials Research Society 1999

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