title: Macroscopic model of phospholipid vesicle spreading and rupture.
abstract: We present a macroscopic model for the spreading and rupture of a spherical lipid vesicle on a flat, isotropic, hydrophilic surface. Formulas for the free energy of the initial and final states are derived, and the details of spreading pathways are examined. We show that the activation barrier for vesicle rupture is too large to be overcome by thermal fluctuations at room temperature and the final configuration is more likely to consist of a deflated vesicle. In order for the vesicle to rupture into a planar bilayer, it would have to be aided by increased temperature, application of an external force, or preparation of a mixed hydrophilic/ hydrophobic surface.
authors.affiliation: Science & Technology Division, Corning Inc., Corning, New York 14831, USA.
authors.forename: A
authors.initials: A
authors.lastname: Efremov
authors.forename: J C
authors.initials: JC
authors.lastname: Mauro
authors.forename: S
authors.initials: S
authors.lastname: Raghavan
mesh_terms: D057927:Hydrophobic and Hydrophilic Interactions; D008051:Lipid Bilayers / Q000737:chemistry*; D008956:Models, Chemical; D010743:Phospholipids / Q000737:chemistry*; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors
chemical_list: D008051:Lipid Bilayers; D010743:Phospholipids