Effective-area elasticity and tension of micromanipulated membranes.
We evaluate the effective Hamiltonian governing, at the optically resolved scale, the elastic properties of micromanipulated 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.
Fournier
J B
JB
Laboratoire de Physico-Chimie Théorique, CNRS Esa 7083, ESPCI, 10 rue Vauquelin, F-75231 Paris Cédex 05, France.
Ajdari
A
A
Peliti
L
L
D001704:Biopolymers / Q000737:chemistry*; D004548:Elasticity; D008563:Membrane Lipids / Q000737:chemistry; D008566:Membranes / Q000737:chemistry*; D008954:Models, Biological; D011506:Proteins / Q000737:chemistry; D013500:Surface Tension
D001704:Biopolymers; D008563:Membrane Lipids; D011506:Proteins