Capillary filling speed of water in nanochannels

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Tas, N.R. and Haneveld, J. and Jansen, H.V. and Elwenspoek, M. and Berg, A. van den (2004) Capillary filling speed of water in nanochannels. Applied Physics Letters, 85 (15). pp. 3274-3276. ISSN 0003-6951

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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.
Item Type:Article
Copyright:© 2004 American Institute of Physics
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/55912
Official URL:http://dx.doi.org/10.1063/1.1804602
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