title: Composite membrane deformation on the mesoscopic length scale.
abstract: The physics of soft materials can be investigated using nuclear spin-lattice relaxation, which depends on the spectral densities of motion in the MHz range. For the first time, NMR relaxation has been used to study influences of the acyl length, polar head groups, a cosurfactant, and cholesterol on the viscoelastic properties of membrane lipids. The results imply the concept of elastic deformation is relevant on lengths approximately equal to the bilayer thickness and less, involving a broad spectrum of collective modes which contribute to the forces between lipid bilayers.
authors.affiliation: Department of Chemistry, University of Arizona, Tucson, Arizona 85721.
authors.forename: M F
authors.initials: MF
authors.lastname: Brown
authors.forename: R L
authors.initials: RL
authors.lastname: Thurmond
authors.forename: S W
authors.initials: SW
authors.lastname: Dodd
authors.forename: D
authors.initials: D
authors.lastname: Otten
authors.forename: K
authors.initials: K
authors.lastname: Beyer
mesh_terms: D001703:Biophysics / Q000379:methods*; D008051:Lipid Bilayers / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008563:Membrane Lipids / Q000737:chemistry*; D015233:Models, Statistical; D055585:Physical Phenomena; D010825:Physics
chemical_list: D008051:Lipid Bilayers; D008563:Membrane Lipids