title: Dynamics of a polymer chain confined in a membrane.
abstract: We present a Brownian dynamics theory with full hydrodynamics (Stokesian dynamics) for a Gaussian polymer chain embedded in a liquid membrane which is surrounded by bulk solvent and walls. The mobility tensors are derived in Fourier space for the two geometries, namely, a free membrane embedded in a bulk fluid, and a membrane sandwiched by the two walls. Within the preaveraging approximation, a new expression for the diffusion coefficient of the polymer is obtained for the free-membrane geometry. We also carry out a Rouse normal mode analysis to obtain the relaxation time and the dynamical structure factor. For large polymer size, both quantities show Zimm-like behavior in the free-membrane case, whereas they are Rouse-like for the sandwiched membrane geometry. We use the scaling argument to discuss the effect of excluded-volume interactions on the polymer relaxation time.
authors.affiliation: Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Ramachandran
authors.forename: S
authors.initials: S
authors.lastname: Komura
authors.forename: K
authors.initials: K
authors.lastname: Seki
authors.forename: G
authors.initials: G
authors.lastname: Gompper
mesh_terms: D004058:Diffusion; D057446:Hydrodynamics; D008565:Membrane Proteins / Q000737:chemistry* / Q000378:metabolism; D056004:Molecular Dynamics Simulation; D010316:Particle Size; D011108:Polymers / Q000737:chemistry* / Q000378:metabolism; D012997:Solvents / Q000737:chemistry
chemical_list: D008565:Membrane Proteins; D011108:Polymers; D012997:Solvents