Adsorption transition of a polyelectrolyte on a high-dielectric charged substrate

Chi Ho Cheng, Pik Yin Lai

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The behavior of a polyelectrolyte adsorbed on a charged surface of high-dielectric constant is studied by both Monte Carlo simulation and analytical methods. It is found that in a low ionic strength medium, the transition is first-order with the repulsive charged surface. The surface monomer density, which is the order parameter of the adsorption transition, follows a linear relation with surface charge density. It indicates that the polyelectrolyte is compressed on the substrate without any conformational change before the desorption. Finally, a different scaling law for the layer thickness is derived and verified by simulation.

Original languageEnglish
Pages (from-to)4
Number of pages1
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Issue number6
StatePublished - 2004


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