Ion correlations drive charge overscreening and heterogeneous nucleation at solid-aqueous electrolyte interfaces.

ABSTRACT: Classical electrical double layer (EDL) models are foundational to the representation of atomistic structure and reactivity at charged interfaces. An important limitation to these models is their dependence on a mean-field approximation that is strictly valid for dilute aqueous solutions. Theoretical efforts to overcome this limitation are severely impeded by the lack of visualization of the structure over a wide range of ion concentration. Here, we report the salinity-dependent evolution of EDL structure at negatively charged mica-water interfaces, revealing transition from the Langmuir-type charge compensation in dilute salt solutions to nonclassical charge overscreening in highly concentrated solutions. The EDL structure in this overcharging regime is characterized by the development of

SUBMITTER: Lee SS 

PROVIDER: S-EPMC8364158 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature