Effective creases and contact angles between membrane domains with high spontaneous curvature
arXiv:cond-mat/0611407 · doi:10.1140/epje/i2006-10039-7
Abstract
We show that the short-scale elastic distortions that are excited in the vicinity of the joint between different lipidic membrane domains (at a scale of \~10 nm) may produce a "crease" from the point of view of the standard elastic description of membranes, i.e., an effective discontinuity in the membrane slope at the level of Helfrich's theory. This "discontinuity" may be accounted for by introducing a line tension with an effective angular dependence. We show that domains bearing strong spontaneous curvatures, such as biological rafts, should exhibit creases with a finite contact-angle, almost prescribed, corresponding to a steep extremum of the line energy. Finite contact-angles might also occur in symmetric membranes from the recruitment of impurities at the boundary.
References in corpus (5)
- Fission of a multiphase membrane tube
- Topography and instability of monolayers near domain boundaries
- Phase ordering and shape deformation of two-phase membranes
- Microscopic membrane elasticity and interactions among membrane inclusions: Interplay between the shape, dilation, tilt and tilt-difference modes
- Bi-Phasic Vesicles: instability induced by adsorption of proteins