title: Adsorption and Dynamics of a Single Polyelectrolyte Chain near a Planar Charged Surface:  Molecular Dynamics Simulations with Explicit Solvent.
abstract: The effect of solvent quality on the behavior of a polyelectrolyte chain near a charged surface is studied using molecular dynamics simulation with explicit solvent. The polyion adsorbs completely on the surface for a high enough surface charge density, and the surface charge required for complete adsorption becomes lower as the solvent quality is decreased. Several static and dynamic properties display a nonmonotonic dependence on surface charge density and solvent quality. For a given value of solvent quality the component of the radius of gyration (Rg) parallel to the surface is a nonmonotonic function of the surface charge density, and for a given surface charge density the component of Rg perpendicular to the surface is a nonmonotonic function of the solvent quality. The center-of-mass diffusion coefficient and rotational relaxation time are nonmonotonic functions of the surface charge density. Translational diffusion coefficient increases, and the rotational relaxation time decreases as solvent quality is decreased for a fixed surface charge density.
authors.affiliation: Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, and Department of Chemistry, Kwangwoon University, Seoul, 139-701, Republic of Korea.
authors.forename: Govardhan
authors.initials: G
authors.lastname: Reddy
authors.affiliation: Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, and Department of Chemistry, Kwangwoon University, Seoul, 139-701, Republic of Korea.
authors.forename: Rakwoo
authors.initials: R
authors.lastname: Chang
authors.affiliation: Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, and Department of Chemistry, Kwangwoon University, Seoul, 139-701, Republic of Korea.
authors.forename: Arun
authors.initials: A
authors.lastname: Yethiraj