Volume 40, Number 4, November II 1997
|Page(s)||405 - 410|
|Section||Condensed matter: structure, thermal and mechanical properties|
|Published online||01 September 2002|
Motion of a massive microsphere bound to a spherical vesicle
Laboratory of Thermodynamics and Physical Hydrodynamics, Faculty of Chemistry,
University of Sofia, 1113 Sofia, Bulgaria
2 Centre de recherche Paul-Pascal, CNRS, avenue A. Schweitzer, 33600 Pessac, France
Corresponding author: email@example.com
Accepted: 11 October 1997
We study the motion of a small solid particle (a few micrometers in size) attached to the membrane of a spherical giant lipid vesicle. By means of optical manipulation, the particle is first brought near the top of the vesicle, and released. We determine the friction experienced by the particle moving along the vesicle surface under the action of gravity. From experiments with latex and glass beads, we check that SOPC membranes are fluid at room temperature (static shear modulus ) and estimate the shear viscosity of SOPC bilayers: surface poise.
PACS: 68.10.Et – Interface elasticity, viscosity, and viscoelasticity / 87.22.-q – Physics of cellular and physiological processes
© EDP Sciences, 1997
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