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The European Physical Journal E

, Volume 4, Issue 1, pp 33–43 | Cite as

Local entropic effects of polymers grafted to soft interfaces

  • T. Bickel
  • C. Jeppesen
  • C.M. Marques

Abstract:

In this paper, we study the equilibrium properties of polymer chains end-tethered to a fluid membrane. The loss of conformational entropy of the polymer results in an inhomogeneous pressure field that we calculate for Gaussian chains. We estimate the effects of excluded volume through a relation between pressure and concentration. Under the polymer pressure, a soft surface will deform. We calculate the deformation profile for a fluid membrane and show that close to the grafting point, this profile assumes a cone-like shape, independently of the boundary conditions. Interactions between different polymers are also mediated by the membrane deformation. This pair-additive potential is attractive for chains grafted on the same side of the membrane and repulsive otherwise.

PACS. 36.20.-r Macromolecules and polymer molecules - 87.15.He Dynamics and conformational changes - 87.16.Dg Membranes, bilayers, and vesicles. 

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Copyright information

© EDP Sciences, Springer-Verlag, Società Italiana di Fisica 2001

Authors and Affiliations

  • T. Bickel
    • 1
  • C. Jeppesen
    • 2
  • C.M. Marques
    • 1
  1. 1.L.D.F.C.-UMR 7506, 3 rue de l'Université, 67084 Strasbourg Cedex, FranceFR
  2. 2.Materials Research Laboratory, University of California, Santa Barbara, CA 93106, USAUS

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