Effective Area-Elasticity and Tension of Micro-manipulated Membranes

Details Effective Area-Elasticity and Tension of Micro-manipulated Membranes Effective Area-Elasticity and Tension of Micro-manipulated Membranes

2001-03-23

arxiv.org/abs/cond-mat/0103495v1

Physics

Condensed Matter

Soft Condensed Matter

To be published in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.86.4970

We evaluate the effective Hamiltonian governing, at the optically resolved scale, the elastic properties of micro-manipulated membranes. We identify floppy, entropic-tense and stretched-tense regimes, representing different behaviors of the effective area-elasticity of the membrane. The corresponding effective tension depends on the microscopic parameters (total area, bending rigidity) and on the optically visible area, which is controlled by the imposed external constraints. We successfully compare our predictions with recent data on micropipette experiments.

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