科研之友
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摘要
To what extent is the ordering of fluids at interfaces governed by the bulk structure of the fluid? In order to address this question, we have studied a dense, charge-stabilized colloidal suspension at the fluid-air interface and at two different solid-fluid interfaces using specular X-ray reflectivity. The experimental data are well described by a simple model of a stratified fluid, with the wall-particle potential mainly affecting the position of the first particle layer with respect to the interface. The decay of the fluid%26apos;s density profile can for all the studied interfaces be described by a characteristic wavelength and a decay length, both of which are independently determined from the bulk phase using small-angle X-ray scattering. This latter finding is consistent with theoretical predictions and recent surface-force experiments.
- 出版日期2012
