Sodium chloride and ethanol induced sphere to rod transition of triblock copolymer micelles

Article Abstract:

Dynamic light scattering, small-angle neutron scattering, and viscosity studies are carried out to examine the influence of NaCl and ethanol on the structure of triblock copolymer [(EO)(sub 20)(PO)(sub 70)-(EO)(sub 20) micelles in aqueous medium. The presence of small amount of ethanol induces a sphere to rod transition of micelles at high temperatures, while the pure triblock copolymer solutions do not show any significant growth of the micelles on approaching the cloud point.

Light scattering, Sodium chloride

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Structure of silica xerogels synthesized with organoalkoxysilane co- reactants hints at multiple phase separation

Article Abstract:

The microstructure of hybrid silica xerogel synthesized by the base-catalyzed polymerization of tetraethoxy-silane (TEOS) in ethanol in the presence of 3-aminopropyltriethoxysilane (AES) and of 3-(2-aminoethylamino)-propyltrimethoxysilane (EDAS) as co-reactants, and dried in subcritical conditions, is analyzed. A set of independent characterization techniques is applied to investigate the texture of the two series of xerogels.

Silica Gel, Crystals, Crystal structure, Structure

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Electrochemical oxidative formation and reductive desorption of a self assembled monolayer of decanethoil on a Au(111) surface in KOH ethanol solution

Article Abstract:

The anodic oxidative adsorption and cathodic reductive desorption of decanethiol layers on Au(111) electrodes in 0.1 M KOH ethanol solutions containing various concentrations of decanethiol is studied. The rate constant for the reductive desorption is determined from the potential dependent peak shift with the value obtained for a self-assembled monolayer prepared without potential control.

Gold Compounds, Monomolecular films

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