Extended Nernst-Planck Equation Incorporating Partial Dehydration Effect

• 作 者: Zhong Wang Zhiyang Yuan Feng Liu
• 机 构: State Key Laboratory of Nuclear Physics and Technology,School of Physics,Peking University,Beijing 1
• 出 处: 中国物理快报（英文版）
• 发表日期: 2020年9期

Novel ionic transporting phenomena emerge as nanostructures approach the molecular scale.At the sub-2 nm scale,widely used continuum equations,such as the Nernst-Planck equation,break down.Here,we extend the Nernst-Planck equation by adding a partial dehydration effect.Our model agrees with the reported ion fluxes through graphene oxide laminates with sub-2 nm interlayer spacing,outperforming previous models.We also predict that the selectivity sequences of alkali metal ions depend on the geometries of the nanostructures.Our model opens a new avenue for the investigation of the underlying mechanisms in nanofluidics at the sub-2 nm scale.