title: Diffusion coefficients in leaflets of bilayer membranes.
abstract: We study diffusion coefficients of liquid domains by explicitly taking into account the two-layered structure called leaflets of the bilayer membrane. In general, the velocity fields associated with each leaflet are different and the layers sliding past each other cause frictional coupling. We obtain analytical results of diffusion coefficients for a circular liquid domain in a leaflet, and quantitatively study their dependence on the interleaflet friction. We also show that the diffusion coefficients diverge in the absence of coupling between the bilayer and solvents, even when the interleaflet friction is taken into account. In order to corroborate our theory, the effect of the interleaflet friction on the correlated diffusion is examined.
authors.affiliation: NRI, National Institute of Advanced Industrial Science and Technology (AIST), AIST Central 5, Higashi 1-1-1, Tsukuba, Ibaraki 305-8565, Japan.
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Seki
authors.affiliation: Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra 400 076, India.
authors.forename: Saurabh
authors.initials: S
authors.lastname: Mogre
authors.affiliation: Department of Chemistry, Tokyo Metropolitan University, Tokyo 192-0397, Japan.
authors.forename: Shigeyuki
authors.initials: S
authors.lastname: Komura
mesh_terms: D003198:Computer Simulation; D004058:Diffusion; D017276:Friction; D002479:Inclusion Bodies / Q000737:chemistry*; D008051:Lipid Bilayers / Q000737:chemistry*; D008956:Models, Chemical; D008958:Models, Molecular; D033081:Shear Strength; D012997:Solvents / Q000737:chemistry*; D013314:Stress, Mechanical
chemical_list: D008051:Lipid Bilayers; D012997:Solvents