Impact of surface hydrophobicity and ion steric effects on the electroosmotic flow and ion selectivity of a conical nanopore

Surface charge density governs the ionic current rectification direction in asymmetric graphene oxide channels

“…Notably, ions in electrically neutral asymmetric channels also undergo unique rectification phenomena due to the spatial confinement to hydrated ions. 19,20 This asymmetry produces various fascinating electrokinectic phenomena such as ionic current rectification (ICR), 1–3 electroosmotic flow rectification (EFR), 21,22 ion concentration polarization (ICP) 23,24 and ion selectivity. 25…”

“…Notably, ions in electrically neutral asymmetric channels also undergo unique rectification phenomena due to the spatial confinement to hydrated ions. 19,20 This asymmetry produces various fascinating electrokinectic phenomena such as ionic current rectification (ICR), [1][2][3] electroosmotic flow rectification (EFR), 21,22 ion concentration polarization (ICP) 23,24 and ion selectivity. 25 The ICR phenomenon occurs when a voltage is applied at the ends of an asymmetric nanochannel immersed in a salt solution, and the rectified nanofluidic membranes have a wide range of applications.…”

Electrophoretic motion of hydrophobic spherical particles in nanopore: Characteristics, separation, and resistive pulse sensing

“…Nanopores which are categorized into However, as the ratio of surface to volume is very high on the micro and nanoscale, the transport of fluid in micro and nanopores is always a serious challenge. Several studies have been conducted to reduce the friction and increase transport efficiency 33,34 . Liu et al 29 investigated the effect of contact angle on the rapid transport of proteins in solid-state nanopores.…”