Dynamics of a polymer chain confined in a membrane

Dynamics of a polymer chain confined in a membrane,10.1140/epje/i2011-11046-3,European Physical Journal E,Sanoop Ramachandran,Shigeyuki Komura,Kazuhik

Dynamics of a polymer chain confined in a membrane   (Citations: 2)
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.  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.
Journal: European Physical Journal E - EUR PHYS J E , vol. 34, no. 5, pp. 1-13, 2011
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