Thermotropic Phase Transition in an Adsorbed Melissic Acid Film at the n-Hexane - Water Interface

Abstract

A reversible thermotropic phase transition in an adsorption melissic acid film at the interface between n-hexane and an aqueous solution of potassium hydroxide (pH=10) is investigated by X-ray reflectometry and diffuse scattering using synchrotron radiation. The experimental data indicate that the interface "freezing" transition is accompanied not only by the crystallization of the Gibbs monolayer but also by the formation of a planar smectic structure in the ~300-Angstrom-thick adsorption film; this structure is formed by ~50-Angstrom-thick layers.

arXiv comment6 pages, 7 figures

References in corpus (5)

• Compact Layer of Alkali Ions at the Surface of Colloidal Silica
• X-ray study of the electric double layer at the n-hexane/nanocolloidal silica interface
• Diffuse X-Ray Scattering near a Two-Dimensional Solid - Liquid Phase Transition at the n-Hexane - Water Interface
• Solid - Liquid Phase Transition in a Gibbs Monolayer of Melissic Acid at the n-Hexane - Water Interface
• The Critical Crossover at the n-Hexane - Water Interface

Cited by in corpus (2)

• X-Ray Study of Thermotropic Mesophases of an n-Triacontanol Adsorption Film at the n-Hexadecane - Water Interface
• X-Ray Scattering near a Liquid - Vapor Phase Transition at the n-Hexane - Water Interface