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Water flow enhancement in hydrophilic nanochannels


Reference:

Lee, K. P., Leese, H. and Mattia, D., 2012. Water flow enhancement in hydrophilic nanochannels. Nanoscale, 4 (8), pp. 2621-2627.

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    Official URL:

    http://dx.doi.org/10.1039/C2NR30098B

    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.

    Details

    Item Type Articles
    CreatorsLee, K. P., Leese, H. and Mattia, D.
    DOI10.1039/C2NR30098B
    DepartmentsFaculty of Engineering & Design > Chemical Engineering
    Publisher StatementMattia_Nanoscale_2012_4_8_2621.pdf: This is not the final version of the paper and its content should not be used as a reference. Please refer to the published journal article or contact the author to obtain a copy of the published article
    RefereedYes
    StatusPublished
    ID Code30047

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