Capillary filling speed of water in nanochannels

Niels Roelof Tas, J. Haneveld, Henricus V. Jansen, Michael Curt Elwenspoek, Albert van den Berg

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    Abstract

    The capillary filling speed of water in nanochannels with a rectangular cross section and a height on the order of 100 nm has been measured over a length of 1 cm. The measured position of the meniscus as a function of time qualitatively follows the Washburn model. Quantitatively, however, there is a lower than expected filling speed, which we attribute to the electro-viscous effect. For demineralized water in equilibrium with air the elevation of the apparent viscosity amounts up to 24±11% in the smallest channels (53 nm height). When using a 0.1 M NaCl (aq) solution the elevation of the apparent viscosity is significantly reduced
    Original languageUndefined
    Pages (from-to)3274-3276
    Number of pages3
    JournalApplied physics letters
    Volume85
    Issue number1
    DOIs
    Publication statusPublished - 11 Oct 2004

    Keywords

    • IR-55912
    • METIS-219721
    • EWI-10031

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