Past Seminars Seminários Já Decorridos 2007

Model for curvature-driven pearling instability in membranes

By: Aurora Hernandez Machado
From: Universitat de Barcelona, Spain
At: Complexo Interdisciplinar, Anfiteatro
[2007-05-30] 11:30

A phase-field model for dealing with dynamic instabilities in membranes is presented. We use it to study curvature-driven pearling instability in vesicles induced by the anchorage of amphiphilic polymers on the membrane. Within this model, we obtain the morphological changes reported in recent experiments. The formation of a homogeneous pearled structure is achieved by consequent pearling of an initial cylindrical tube from the tip. For high enough concentration of anchors, homogeneous pearled shapes are energetically less favorable than an inhomogeneous one, with a large sphere connected to an array of smaller spheres.