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| Hauptseite > Publikationsdatenbank > Dynamics of a polymer chain confined in a membrane |
| Hauptseite > Publikationsdatenbank > Dynamics of a polymer chain confined in a membrane |
| Journal Article | PreJuSER-15475 |
; ; ;
2011
Springer
Berlin
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Please use a persistent id in citations: http://hdl.handle.net/2128/28954 doi:10.1140/epje/i2011-11046-3
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.
Keyword(s): Diffusion (MeSH) ; Hydrodynamics (MeSH) ; Membrane Proteins: chemistry (MeSH) ; Membrane Proteins: metabolism (MeSH) ; Molecular Dynamics Simulation (MeSH) ; Particle Size (MeSH) ; Polymers: chemistry (MeSH) ; Polymers: metabolism (MeSH) ; Solvents: chemistry (MeSH) ; Membrane Proteins ; Polymers ; Solvents ; J
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