The Role of Surface Chemistry in the Orientational Behavior of Water at an Interface.

ABSTRACT: Molecular dynamics studies have demonstrated that molecular water at an interface, with either a gas or a solid, displays anisotropic orientational behavior in contrast to its bulk counterpart. This effect has been recently implicated in the like-charge attraction problem for colloidal particles in solution. Here, negatively charged particles in solution display a long-ranged attraction where continuum electrostatic theory predicts monotonically repulsive interactions, particularly in solutions with monovalent salt ions at low ionic strength. Anisotropic orientational behavior of solvent molecules at an interface gives rise to an excess interfacial electrical potential which we suggest generates an additional solvation contribution to the total free energy that is traditionally overlooked

SUBMITTER: Walker-Gibbons R 

PROVIDER: S-EPMC9251758 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature