The interactions between an anionic dye, Acid Green 25 AG and the two cationic surfactants tetradecyltrimethylammonium bromide TTAB, and hexadecyltrimethylammonium bromide CTAB in aqueous solutions far below the CMC are studied using the conductometric method at different temperature. The equilibrium constants and other thermodynamic functions for the process of dye-surfactant ion pair formatio...

We evaluated hexadecyltrimethylammonium bromide (HTAB) for liquid crystals (LCs) in layered ITO cells with various cell gap conditions. HTAB is a surfactant that can self-align vertically on the surface of indium tin oxide (ITO) substrates and induce homeotropic alignment LC molecules. For implementing RF devices LCs, we should consider limitations caused by design conditions which are differen...

A unique methodology having access to Au nanorods (AuNRs)-based hollow alloy nanostructures has been developed. The syntheses and characterization of the hollow Pt-Au nanoalloys with ellipsoidal and cylindrical shapes together with a rattle-type hollow Cu-Au nanoheterostructure are described. Unlike the conventional nanoscale Kirkendall process, the formation of these AuNRs-based hollow nanostr...

PPMANC1 and PMMANC2 nanocomposites have been fabricated using two reactive clays by methods characterized in order to estimate the impact of different dispersion states on mechanical properties. A simple economical process polymerisation is adopted develop PMMANC an Algerian clay, trying optimize distribution PMMA clay layers. Two distinct types organic mined, labelled as (i) benzyltrimethyl am...

Modification of the silanophilic activity of the inner surface of the capillary wall was studied in a capillary electrophoretic system using alkylamines containing background electrolytes at acid pH. The effect of the following amine additives was investigated: (1) alkyl-alpha,omega-diamines (1,2-diaminoethane, 1,4-diaminobutane, 1,7-diaminoheptane, spermine), (2) polymeric amines (polyethyleni...

The impact of zeolite hierarchization is often highlighted in terms increased mesopore volume or specific surface area and preservation micropore volume. Yet, although these targets may be achieved, the accessibility to certain micropores might negatively affected during hierarchization. A set hierarchical MCM-22 based materials prepared on desilication treatments MCM-22, layered precursor MCM-...