Rheology of Giant Vesicles: A Micropipette Study
- 10 March 2004
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 92 (10), 108103
- https://doi.org/10.1103/physrevlett.92.108103
Abstract
We develop a micropipette rheometer to study the effect of oscillatory shear flow on the spontaneous fluctuations of phospholipid bilayers. Our results on giant vesicles show that oscillatory shear flow leads to a suppression of membrane fluctuations. They also imply that the Helfrich equation is modified in the presence of the flow. This equation, a fundamental constitutive relation between the amount of area stored in the fluctuations and the membrane tension, must be supplemented under oscillatory shear by a flow excess function that we determine.Keywords
This publication has 14 references indexed in Scilit:
- Active membrane fluctuations studied by micropipet aspirationPhysical Review E, 2001
- Effective-Area Elasticity and Tension of Micromanipulated MembranesPhysical Review Letters, 2001
- Effect of Chain Length and Unsaturation on Elasticity of Lipid BilayersBiophysical Journal, 2000
- Deformation of giant lipid bilayer vesicles in shear flowPhysical Review E, 1997
- Configurations of fluid membranes and vesiclesAdvances in Physics, 1997
- Statistical Thermodynamics of Surfaces, Interfaces, and MembranesPhysics Today, 1996
- Colloidal effects of anchored polymers in lamellar liquid-crystalline dispersionsColloids and Surfaces A: Physicochemical and Engineering Aspects, 1994
- Mixed micelles in drug deliveryNature, 1992
- Physical properties of surfactant bilayer membranes: thermal transitions, elasticity, rigidity, cohesion and colloidal interactionsThe Journal of Physical Chemistry, 1987
- Frequency spectrum of the flicker phenomenon in erythrocytesJournal de Physique, 1975