Diffusion Limitations and Translocation Barriers in Atomically Thin Biomimetic Pores.

ABSTRACT: Ionic transport in nano- to sub-nano-scale pores is highly dependent on translocation barriers and potential wells. These features in the free-energy landscape are primarily the result of ion dehydration and electrostatic interactions. For pores in atomically thin membranes, such as graphene, other factors come into play. Ion dynamics both inside and outside the geometric volume of the pore can be critical in determining the transport properties of the channel due to several commensurate length scales, such as the effective membrane thickness, radii of the first and the second hydration layers, pore radius, and Debye length. In particular, for biomimetic pores, such as the graphene crown ether we examine here, there are regimes where transport is highly sensitive to the pore size due to th

SUBMITTER: Sahu S 

PROVIDER: S-EPMC7712548 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature