Nonaxisymmetric phospholipid vesicles: Rackets, boomerangs, and starfish
Abstract
Within the area difference elasticity model, we numerically minimize the bending energy of phospholipid vesicles to study the nonaxisymmetric shapes at the oblate-prolate transition. We analyze the onset of a coherent structural hierarchy of hybrid shapes such as rackets, boomerangs, and starfish, which all consist of a flattened body and one or more elongated arms. The phase diagram of these shapes is characterized by a critical point terminating the line of discontinuous transitions between rackets and boomerangs/starfish. The critical point is located very close to the discocyte with the volume of a human erythrocyte, implying that in this part of the parameter space minute variations of volume and area difference can induce large changes of shape.
- Publication:
-
EPL (Europhysics Letters)
- Pub Date:
- June 2005
- DOI:
- 10.1209/epl/i2004-10527-4
- Bibcode:
- 2005EL.....70..690Z