Thermodynamics of polymer adsorption to a flexible membrane

Details Thermodynamics of polymer adsorption to a flexible membrane Thermodynamics of polymer adsorption to a flexible membrane

2011-09-23

arxiv.org/abs/1109.5077v1

Phys. Rev. E 84, 031803 (2011)

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1103/PhysRevE.84.031803

We analyze the structural behavior of a single polymer chain grafted to an attractive, flexible surface. Our model is composed of a coarse-grained bead-and-spring polymer and a tethered membrane. By means of extensive parallel tempering Monte Carlo simulations it is shown that the system exhibits a rich phase behavior ranging from highly ordered, compact to extended random coil structures and from desorbed to completely adsorbed or even partially embedded conformations. These findings are summarized in a pseudophase diagram indicating the predominant class of conformations as a function of the external parameters temperature and polymer-membrane interaction strength. By comparison with adsorption to a stiff membrane surface it is shown that the flexibility of the membrane gives rise to qualitatively new behavior such as stretching of adsorbed conformations.

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