Motion of phospholipidic vesicles along an inclined plane: sliding and rolling - PubMed (original) (raw)
. 2001 Apr;63(4 Pt 1):041906.
doi: 10.1103/PhysRevE.63.041906. Epub 2001 Mar 27.
Affiliations
- PMID: 11308876
- DOI: 10.1103/PhysRevE.63.041906
Motion of phospholipidic vesicles along an inclined plane: sliding and rolling
M Abkarian et al. Phys Rev E Stat Nonlin Soft Matter Phys. 2001 Apr.
Abstract
The migration of giant phospholipidic vesicles along an inclined plane in a quiescent fluid was observed as a function of the mass and the radius R of the vesicles, and as a function of the angle of inclination of the plane. Vesicles were swollen, and did not adhere to the substrate surface. It was observed from a side-view chamber that they have quasispherical shapes. The vesicles mainly slide along the plane, but also roll. The ratio omegaR/v of rotational to translational velocities is of the order of 0.15 for vesicles of radius ranging from 10 to 30 microm. Values of this ratio, and variations of v versus R, are well described by Goldman et al.'s model developed for the motion of rigid spheres close to a wall [Chem. Eng. Sci. 22, 637 (1967)]. In this framework, the thickness of the fluid film between the vesicle and the substrate derived from fitting experimental data was found to be equal to 48 nm.
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