Volume 82, Number 4, May 2008
|Number of page(s)||5|
|Section||Interdisciplinary Physics and Related Areas of Science and Technology|
|Published online||06 May 2008|
Nanotubes from gelly vesicles
Laboratoire PCC Institut Curie, CNRS UMR 168, University Paris 6 - 75231 Paris Cedex 05, France, EU
2 Laboratoire Electronique Molculaire Organique et Hybride, UMR 5819 SPrAM (CEA-CNRS-UJF), DRFMC, CEA-Grenoble - 38054 Grenoble Cedex 9, France, EU
3 Laboratoire Adhèsion et Inflammation, U 600 CNRS-INSERM - Luminy, France, EU
Corresponding authors: email@example.com firstname.lastname@example.org email@example.com
Accepted: 25 March 2008
Hydrodynamic extrusions of tethers from giant unilamellar vesicles (GUV) enclosing a poly-N-isopropylacrylamide (polyNIPAM) gel are studied. The collapse of the gel upon heating induces a deswelling of the GUV, showing that the membrane is linked to the polymer network. The gelly vesicle is attached to a micro-rod and submitted to a flow (velocity U). Above a threshold velocity (U > Uc) a tether is extruded and reaches a stationary length L in a characteristic time . The vesicle behaves like an entropic spring with a tether length L proportional to the Stokes friction force. Compared to viscous “sol" vesicles, gelly vesicle are much stiffer: L and being hundred times smaller. We conclude that the mobility of lipids is reduced, only a small portion of the vesicle area being free to flow into the tube.
PACS: 87.16.D- – Membranes, bilayers, and vesicles / 82.70.Gg – Gels and sols / 83.50.Ha – Flow in channels
© EPLA, 2008
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.