A conformational phase transition in a Langmuir film of an amphiphilic azacrown

Article Abstract:

A study was conducted to analyze an amphiphilic azacrown derivative at the air-water interface using grazing-incidence x-ray diffraction, x-ray reflectivity and Brewster-angle microscopy techniques. The derivative supported a ring-shaped, flexible core with six alkyl chains. Results indicated that low-density monolayer films of azacrown at the air-water interface supports a disordered structure with cores parallel to the water surface.

Thin films, Multilayered, Multilayered thin films

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Electrical rectification by a monolayer of hexadeclquinolinium tricyanoquinodimethanide measured between macroscopic gold electrodes

Article Abstract:

The zwitterionic molecule C16H33Q-3CNQ is a rectifier of electrical current as a single monolayer is established with oxide-free Au electrodes. The data coupled with a theoretical equation, allows making an estimate that the relevant molecular orbital for enhanced electron transfer is at -4.0 plusmn 0.25 eV, relative to vacuum.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Gold, Electric properties

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Evolution of a steady state island size distribution during self-assembled monolayer dissolution

Article Abstract:

The dissolution of the self-assembled monolayer of octadecylphosphonic acid from a mica surface in realtime using atomic force microscopy was observed. The final distribution is in good agreement with a decaying exponential form, consistent with a "point island" model of island shrinkage and growth.

Usage, Atomic force microscopy

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