Abstracts

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Tail ordering due to headgroup hydrogen bonding interactions in surfactant monolayers at the water-oil interface

Article Abstract:

The triacontanoic acid monolayers at the water-hexane interface were studied to demonstrate that a small change in the headgroup structure, which alters the hydrogen bonding interactions, leads to a large conformational change from disordered to ordered tailgroups. The molecular dynamics simulations demonstrate the presence of hydrogen bonding between the triacontanoic acid headgroups that is likely responsible for the tail ordering.

United States, Structure

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Surfactant and water ordering in triacontanol monolayers at the water-hexane interface

Article Abstract:

A comparative study of a long-chain alkanol at the water-vapor and water-hexane interfaces using X-ray reflectivity to highlight significant differences between these two interfaces is presented. The results revealed that at the water-hexane interface, the density in the headgroup region is 10-15% greater than either bulk water or the ordered headgroup region found at the water-vapor interface.

Analysis, Chemical reactions

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Probing surface properties and glass-liquid transition of amorphous solid water: Temperature-programmed TOF-SIMS and TDP studies of adsorption/desorption of hexane

Article Abstract:

The interaction of hexane with amorphous solid water was investigated in terms of the surface diffusion, hydrogen bond imperfections, hydrophobic hydration, crystallization and glass-liquid transition. The results revealed that the structural relaxation commences at the conventional glass-transition temperature but required considerable long aging time.

Hydrophobic effect

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