Europhys. Lett., 64 (2) , pp. 281-287 (2003)
Effects of a pulling force on the shape of a bound vesicleA.-S. Smith1, E. Sackmann1 and U. Seifert2
1 Technische Universität München, E22 Institut für Biophysik D-85748 Garching, Germany
2 Universität Stuttgart, II. Institut für Theoretische Physik D-70550 Stuttgart, Germany
(Received 20 May 2003; accepted in final form 4 August 2003)
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.
87.16.Dg - Membranes, bilayers, and vesicles.
© EDP Sciences 2003