Effects of a pulling force on the shape of a bound vesicle

We develop a theoretical model to describe the vertical pulling of vesicles adhered in a contact potential. For a range of applied forces, locally stable bound shapes, separated from the free shape by an energy barrier, can be found. The phase diagram contains regions with either a unique bound shap...

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Bibliographic Details
Published in:Europhysics letters 2003-10, Vol.64 (2), p.281-287
Main Authors: Smith, A.-S, Sackmann, E, Seifert, U
Format: Article
Language:English
Subjects:
87.16.Dg
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Membranes
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Summary:We develop a theoretical model to describe the vertical pulling of vesicles adhered in a contact potential. For a range of applied forces, locally stable bound shapes, separated from the free shape by an energy barrier, can be found. The phase diagram contains regions with either a unique bound shape or an additional meta-stable shape. Upon pulling, these shapes unbind discontinuously since the vesicles disengage from the substrate while still possessing a finite adhesion area.
ISSN:0295-5075
1286-4854
DOI:10.1209/epl/i2003-00499-9