Water flow enhancement in hydrophilic nanochannels

Kah Peng Lee, Hannah Leese, Davide Mattia

Research output: Contribution to journal › Article

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Abstract

All published reports on fluid flow enhancement and water slippage are associated with hydrophobic surfaces, such as carbon nanotubes. Here, we investigate water flow in hydrophilic alumina nanochannels with diameters ranging from 20 nm to 100 nm. For the smallest channels tested, the water permeability is more than double than the theoretical prediction using the Hagen-Poiseuille equation. Though such an enhancement is significantly smaller than what has been measured in carbon nanotubes, it clearly shows that flow enhancement and water slippage occurs on hydrophilic surfaces as well, contrary to existing theoretical models. To the authors' knowledge, it is the first experimental demonstration of water slippage on hydrophilic surfaces. The results show the dependence of the flow enhancement on the surface chemistry, diameter and length of the nanochannel.
LanguageEnglish
Pages2621-2627
Number of pages7
JournalNanoscale
Volume4
Issue number8
Early online date29 Feb 2012
DOIs
StatusPublished - 21 Apr 2012

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Carbon Nanotubes
Water
Carbon nanotubes
Aquaporins
Aluminum Oxide
Surface chemistry
Flow of fluids
Demonstrations
Alumina

Cite this

Water flow enhancement in hydrophilic nanochannels. / Lee, Kah Peng; Leese, Hannah; Mattia, Davide.

In: Nanoscale, Vol. 4, No. 8, 21.04.2012, p. 2621-2627.

Research output: Contribution to journal › Article

Lee, KP, Leese, H & Mattia, D 2012, 'Water flow enhancement in hydrophilic nanochannels' Nanoscale, vol. 4, no. 8, pp. 2621-2627. DOI: 10.1039/C2NR30098B
Lee KP, Leese H, Mattia D. Water flow enhancement in hydrophilic nanochannels. Nanoscale. 2012 Apr 21;4(8):2621-2627. Available from, DOI: 10.1039/C2NR30098B
Lee, Kah Peng ; Leese, Hannah ; Mattia, Davide. / Water flow enhancement in hydrophilic nanochannels. In: Nanoscale. 2012 ; Vol. 4, No. 8. pp. 2621-2627
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