Effects of Hydrodynamic Interactions on the Near-Surface Diffusion of Spheroidal Molecules.

ABSTRACT: We investigated diffusion of spheroidal molecules near a planar surface, accounting for spatially dependent translational and rotational mobilities of molecules resulting from their hydrodynamic interactions with the plane. Rigid-body Brownian dynamics simulations of prolate ellipsoids of revolution of an axial ratio in the range of 1.5 to 3.0, suspended in a viscous fluid, with a no-slip flat boundary confining the suspension were employed. Mobility tensor matrices of molecules were evaluated as functions of spheroids' distance and orientation with respect to the plane. Hydrodynamic interactions with the surface lead to substantial changes of spheroids' translational diffusion coefficients both in the direction perpendicular and parallel to the plane when compared with the values characte

SUBMITTER: Czajka P 

PROVIDER: S-EPMC6796493 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature