Electro-osmotic flow in hydrophobic nanochannels

Abstract

An analytical theory of electroosmosis in hydrophobic nanochannels of large surface potential/charge density incorporates a mobility of adsorbed charges and hydrodynamic slip, and is valid both for thin and strongly overlapping diffuse layers.

Fast increase of nanofluidic slip in supercooled water: the key role of dynamics

“…Because nanofluidic slip is key to improving the performance of nanofluidic systems, [15][16][17][18][19][20][21] an intensive experimental effort has been undertaken during the recent years to characterize the ultra-low liquid-solid friction of new 2D materials and their derivative. [22][23][24][25] On the modeling side, several efforts have been pursued in order to understand the molecular mechanisms that control friction, with special interest on the discussion of the relation between the friction coefficient and the time autocorrelation of the force exerted by the liquid on the wall.…”

Intrinsic hydrophobicity of smectite basal surfaces quantitatively probed by molecular dynamics simulations

“…Edge hydroxyl groups can be distinguished from H 2 O molecules at basal surfaces after deuteration also by means of vibrational spectroscopy (Harvey et al, 2019). Studies on electroosmotic flow through hydrophobic nanochannels have shown the dependence of the flow on the surface charge density (Silkina et al, 2019).…”

Generalization of elastohydrodynamic interactions between a rigid sphere and a nearby soft wall

“…For instance, in addition to DLVO forces, other short-range forces, including acid-base, hydration, solvation and steric interactions may lead to some discrepancies between observed dynamical responses and theoretical predictions, typically below liquid film thicknesses to the tune of 5 nm. At the geometric length scales that this study deals with, additional physical effects, such as wall slip, electrokinetics, capillarity and more, can also affect the system response in a rather decisive manner (Vinogradova & Feuillebois 2000;Talapatra & Chakraborty 2008;Dey, Chakraborty & Chakraborty 2011;Goswami & Chakraborty 2011;Bakli & Chakraborty 2012;Bandopadhyay & Chakraborty 2012b;Kar, Maiti & Chakraborty 2015;Bandopadhyay et al 2016;Karan, Chakraborty & Chakraborty 2018a;Silkina, Asmolov & Vinogradova 2019;Zhao et al 2020).…”