| Issue |
Europhys. Lett.
Volume 59, Number 1, July 2002
|
|
|---|---|---|
| Page(s) | 87 - 93 | |
| Section | Condensed matter: structure, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2002-00163-6 | |
| Published online | 01 June 2002 | |
The dynamics of vesicle thermal fluctuations is controlled by intermonolayer friction
UMR-CNRS 6052, ENSC-Rennes - Avenue Leclerc,
F-35700 Rennes, France
Corresponding author: Philippe.Meleard@ensc-rennes.fr
Received:
14
November
2001
Accepted:
28
March
2002
Thermal shape fluctuations of stearoyl-oleoyl-phosphatidylcholine
(SOPC) vesicles are studied using video microscopy. Herein, we
show experimentally that the dynamics of GUV fluctuations clearly
involves two relaxation processes, in agreement with theoretical
predictions. This demonstrates that intermonolayer friction is an
important phenomenon for the relaxation processes of fluctuating
bilayers. We further discuss our data in the light of two
existing theoretical approaches describing the dynamics of
quasi-spherical fluctuating vesicles. However, our results do not
permit to favor one approach over the other. Nonetheless, from
our data we estimate the intermonolayer friction coefficient for
SOPC bilayers to be within the interval 
and 
, which is
somewhat larger than previously published values using a
different technique.
PACS: 68.15.+e – Liquid thin films / 87.15.-v – Biomolecules: structure and physical properties / 87.16.Dg – Membranes, bilayers, and vesicles
© EDP Sciences, 2002
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