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Water flows at ultimate scales and exotic ionic transport - Lydéric Bocquet - Jeudi 26 septembre 2019 à 16 h 30

INSP - Sorbonne Université - 4 place Jussieu - 75005 Paris - Barre 22-23, 3e étage, salle 317

Lydéric Bocquet, Ecole Normale Supérieure/CNRS

Abstract

It is an exciting period for nanofluidics, the field exploring the transport of fluids at the nanoscales. Routes now exist to fabricate individual channels with nanometric and even sub-nanometric dimensions, while new instruments have also been invented to probe transport across these channels. And indeed, a number of quite exotic properties for water and ion transport have emerged since. This presentation will highlight several such phenomena : ionic transport across carbon and boron-nitride nanotubes, which exhibit contrasting responses for these twin materials with the same crystallography but different electronic properties ; mass transport across these nanotubes, which also highlight drastic differences in permeability and points to a hitherto not appreciated link between hydrodynamic flow and the electronic structure of the confining material ; strongly non-linear transport in sub-nanometric channels, exhibiting mechano-sensitive-like behaviour ; or prediction for ionic Coulomb blockade.

References :

  • “Massive radius-dependent flow slippage in single carbon nanotubes ” E. Secchi, S. Marbach, A. Niguès, D. Stein, A. Siria and L. Bocquet, Nature 537 210 (2016)
  • “Molecular streaming and voltage-gated response in Angström scale channels” T. Mouterde, A. Keerthi, A. Poggioli, S. Dar, A. Siria, A.K. Geim, L. Bocquet and R. Boya, Nature 567 87 (2019)
  • “Ionic Coulomb blockade as a fractional Wien effect ” N. Kavokine, S. Marbach, A. Siria, L. Bocquet, Nature Nanotechnology 14 573 (2019)