Water transport through carbon nanotubes with defects

W. D. Nicholls*, M. K. Borg, D. A. Lockerby, J. M. Reese

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Non-equilibrium molecular dynamics simulations are performed to investigate how changing the number of structural defects in the wall of a (7,7) single-walled carbon nanotube (CNT) affects water transport and internal fluid dynamics. Structural defects are modelled as vacancy sites (missing carbon atoms). We find that, while fluid flow rates exceed continuum expectations, increasing numbers of defects lead to significant reductions in fluid velocity and mass flow rate. The inclusion of such defects causes a reduction in the water density inside the nanotubes and disrupts the nearly frictionless water transport commonly attributed to CNTs.

Original languageEnglish
Pages (from-to)781-785
Number of pages5
JournalMolecular simulation
Volume38
Issue number10
DOIs
Publication statusPublished - 2012

Keywords

  • carbon nanotubes
  • molecular dynamics
  • water flow
  • defects
  • filtration
  • desalination
  • mass transport
  • fluid flow
  • membranes
  • vacancy sites
  • flow enhancement
  • friction

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