Specific cation effects at aqueous solution-vapor interfaces: Surfactant-like behavior of Li⁺ revealed by experiments and simulations.

ABSTRACT: It is now well established by numerous experimental and computational studies that the adsorption propensities of inorganic anions conform to the Hofmeister series. The adsorption propensities of inorganic cations, such as the alkali metal cations, have received relatively little attention. Here we use a combination of liquid-jet X-ray photoelectron experiments and molecular dynamics simulations to investigate the behavior of K⁺ and Li⁺ ions near the interfaces of their aqueous solutions with halide ions. Both the experiments and the simulations show that Li⁺ adsorbs to the aqueous solution-vapor interface, while K⁺ does not. Thus, we provide experimental validation of the "surfactant-like" behavior of Li⁺ predicted by previous simulat

SUBMITTER: Perrine KA 

PROVIDER: S-EPMC5754762 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature