Wetting in Hydrophobic Nanochannels: A Challenge of Classical Capillarity
Journal of the American Chemical Society2005Vol. 127(36), pp. 12446–12447
Citations Over TimeTop 12% of 2005 papers
Abstract
We report an investigation of the water-hydrophobic interface in well-defined nanochannels (R approximately 2-4 nm). Wetting in these systems cannot be described by classical (macroscopic) capillary theory: (1) water occupies only a fraction ( approximately 60%) of the pore volume, and (2) the capillary pressures are approximately 60-90% greater than predicted by the Laplace equation. The results suggest the presence of approximately 0.6 nm layer of low-density fluid (vapor) separating water from the hydrophobic solid.
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