Volume 60, Number 6, December 2002
|Page(s)||875 - 881|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 December 2002|
Extravasation of adhering vesicles
Laboratoire de Physico-Chimie Théorique and FR CNRS 2438
“Matière et Systèmes Complexes”-ESPCI 10 rue Vauquelin,
F-75231 Paris cedex 05, France
Accepted: 4 October 2002
We study how the passage of lipid vesicles through a small pore can be induced by the difference in non-specific adhesion energy between the two sides of the substrate bearing the pore. This process is inspired from the extravasation of cells or liposomes from blood vessels, which involves adhesion binders. We study the adhesion-dominated regime and we show that the passage of a vesicle of volume V and area A is selective in terms of the reduced volume . Extravasation occurs for adhesion ratios of order unity. We also consider the possibility of pressure-induced extravasation in the presence of adhesion. Finally, we propose a micro-device based on adhesion-induced extravasation, which is designed to sort vesicles according to their deflatedness.
PACS: 68.08.Bc – Wetting / 87.16.Dg – Membranes, bilayers, and vesicles / 87.17.Jj – Cell locomotion; chemotaxis and related directed motion
© EDP Sciences, 2002
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