Adhesion of lipid membranes induced byT. Franke1, 2, R. Lipowsky1 and W. Helfrich2
1 Max Planck Institut für Kolloid- und Grenzflächenforschung - Am Mühlenberg 1 14476 Golm, Germany
2 Fachbereich Physik, Freie Universität Berlin - Arnimallee 14, 14195 Berlin, Germany
received 13 February 2006; accepted in final form 18 August 2006
published online 13 September 2006
We describe the apparently first reversible unbinding transition of fluid phosphatidylcholine bilayers. It is induced by minute concentrations of in aqueous 0.1 solution. Mutual adhesion sets in at a threshold of . The adhesion energy increases steeply with concentration up to . It continues to rise with a much smaller slope until the transition becomes irreversible at ca. .
82.70.Uv - Surfactants, micellar solutions, vesicles, lamellae, amphiphilic systems (hydrophilic and hydrophobic interactions).
87.16.Dg - Membranes, bilayers, and vesicles.
87.15.Ya - Fluctuations.
© EDP Sciences 2006