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Capillary filling speed of water in nanochannels

delete2004-10-11
delete267
PRE
AI
N
Niels R. Tas
J
Jeroen Haneveld
J
Jansen, HV
A
Albert van den Berg
DOI:10.1063/1.1804602delete
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Abstract

Abstract

En 中文
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. (C) 2004 American Institute-of Physics.
Keywords:
DYNAMIC CONTACT-ANGLE
FLOW
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Journal

Applied Physics Letters cover
Applied Physics Letters
IF:
3.6
Papers:
10.4W
Citations:
17.8W

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