학술논문
Formation of n-Alkane Layers at the Vapor/Water Interface.
Document Type
Article
Source
Subject
*ALKANES
*NEUTRONS
*X-rays
*ADSORPTION (Chemistry)
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Language
ISSN
0743-7463
Abstract
We present a study on the initial wetting behaviors of two low molecular weight alkanes, heptane and octane, at the vapor/water interface using both neutron and X-ray reflectometry. Combined X-ray and neutron reflectivity studies data showed that a uniform film, which has never been reported, was formed continuously at 25 °C. As the adsorptive deposition continued, each adsorbed film was saturated at a specific equilibrium thickness: 48 and 36 Å for deuterated heptane and octane, respectively, and 21 Å for hydrogenated octane. The thickness of the adsorbed layer measured by neutron reflectivity is in agreement with that measured using X-ray reflectivity. Our observations of continuous and saturated adsorption behaviors are analyzed qualitatively using a kinetic adsorption model. [ABSTRACT FROM AUTHOR]