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IRTG / Soft Matter Science
Freiburger Materialforschungszentrum
Stefan-Meier-Str. 21
79104 Freiburg, Germany


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You are here: Home Events Dr. Shigeyuki Komura "Dynamics of a polymer chain confined in a membrane"

Dr. Shigeyuki Komura "Dynamics of a polymer chain confined in a membrane"

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Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University,Tokyo 192-0397, Japan

  • Seminar
When Sep 27, 2011
from 10:30 AM to 11:30 AM
Where «Amphithéâtre de l’Institut Charles Sadron», 23 rue du Loess, 67034 Strasbourg
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We present a Brownian dynamics theory with full hydrodynamics for a Gaussian polymer chain embedded in a liquid membrane which is surrounded by bulk solvent and walls. We consider 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.


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