Anomalous lateral diffusion in a viscous membrane surrounded by viscoelastic media
Soft Condensed Matter
2015-06-04 v1
Abstract
We investigate the lateral dynamics in a purely viscous lipid membrane surrounded by viscoelastic media such as polymeric solutions. We first obtain the generalized frequency-dependent mobility tensor and focus on the case when the solvent is sandwiched by hard walls. Due to the viscoelasticity of the solvent, the mean square displacement of a disk embedded in the membrane exhibits an anomalous diffusion. An useful relation which connects the mean square displacement and the solvent modulus is provided. We also calculate the cross-correlation of the particle displacements which can be applied for two-particle tracking experiments.
Cite
@article{arxiv.1202.3912,
title = {Anomalous lateral diffusion in a viscous membrane surrounded by viscoelastic media},
author = {S. Komura and S. Ramachandran and K. Seki},
journal= {arXiv preprint arXiv:1202.3912},
year = {2015}
}
Comments
6 pages, 2 figures