title: How does the mobility of phospholipid molecules at a water/oil interface reflect the viscosity of the surrounding oil?
abstract: The mobility of phospholipid molecules at a water/oil interface on cell-sized phospholipid-coated microdroplets was investigated through the measurement of diffusion constants by fluorescence recovery after photobleaching. It is found that the diffusion constant of phospholipids showed the relation D approximately (eta water + eta oil) -0.85, where D is the diffusion constant, eta water is the viscosity of water, and eta oil is the viscosity of oil. This observation indicates that the viscosity of the surrounding oil is the primary factor that determines the diffusibility of phospholipids at a water/oil interface.
authors.affiliation: Department of Physics, Graduate School of Science, Kyoto University, Kyoto, Japan.
authors.forename: Makiko
authors.initials: M
authors.lastname: Negishi
authors.forename: Hideki
authors.initials: H
authors.lastname: Seto
authors.forename: Masahiko
authors.initials: M
authors.lastname: Hase
authors.forename: Kenichi
authors.initials: K
authors.lastname: Yoshikawa
mesh_terms: D004058:Diffusion; D009821:Oils / Q000737:chemistry*; D010743:Phospholipids / Q000737:chemistry*; D013499:Surface Properties; D014783:Viscosity; D014867:Water / Q000737:chemistry*
chemical_list: D009821:Oils; D010743:Phospholipids; D014867:Water