Abstract
We review recent work on the dynamics of membranes. First, we discuss the viscous modes of a free bilayer membrane, taking into account the coupling between bending and the local density of the two monolayers. Apart from important corrections to the conventional bending mode, we obtain a second slow mode which is essentially a fluctuation in the density difference of the two monolayers, damped by intermonolayer friction. Estimates for a stack of membranes show reasonable agreement with a recent spin-echo study of membrane undulations. Second, we discuss the dispersion relation for both fluid and polymerized membranes bound to a substrate by an attractive potential. The interplay between the hydrodynamic damping by the surrounding liquid and the restoring force in the binding potential leads to a q 2 dependence of the damping rate γ at small wavevector q. With increasing q, various crossovers can occur, including the possibility of nonmonotonic damping in which γ decreases with q as ∼ 1/ q.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
