Azobenzene dye induced micelle to vesicle transition in cationic surfactant aqueous solutions

Drug induced micelle-to-vesicle transition in aqueous solutions of cationic surfactants

“…In all systems we observed precipitation, e.g., at 20 mmol DS. Similar changes were observed when the photo-responsive dye sodium 4-[(E)phenyldiazenyl]benzoate was added to a micellar solution of C 16 Me 3 ABr, 61 and are indicative of micelles to vesicles transition. 62 Additionally in the case of ILBSs we observed phase separation, e.g., at 25 and 30 mmol DS (Fig.…”

Synergistic Interaction between Cholesterol and Functionalized Ionic Liquid Based Surfactant Leading to the Morphological Transition

“…The changes in optical density at 500 nm are shown in Figure at the fixed concentration of all the amphiphiles (20 mM) with increasing concentration of Cho. At very low concentration of Cho (< 0.1 mM), absorbance was found near to zero and samples appeared to be clear, probably due to the spherical aggregates of smaller sizes . Further, with increasing concentration of Cho, optical density increases gradually reached to the maximum and then decreases to attain apparently constant value.…”

Rheology of branched wormlike micelles

“…The shear rate at which shear-thinning begins is related to the inverse of the relaxation time (see Section 2), which depends on the concentration with a minimum transition rate occurring at the same concentration where there is a maximum in the zero-shear viscosity. Similar dependencies on the onset rate of shearthinning were shown by: Ahmed and Aramaki [39] by controlling the temperature of ChEO m (m = 15 and 30); by Aramaki et al [40] by varying the weight fraction of alcohol in water/C 16 SE/monohydroxy alcohol systems; by Chu et al [28] by altering the total surfactant concentration in EDAS and NaCl mixtures; by Ge et al [37] by altering the ratio of mixed aromatic counterions of NaSal and NaEBS in CTAC cationic surfactant solutions; by Li et al [35] by controlling the temperature in CTAB and AZONa mixtures; by Lu et al [30] by altering the mass fraction of HN in HN/CTAB systems at a fixed temperature; by Sakai et al [44] by varying the HTAB concentration in mixtures of gemini surfactants; by Shrestha et al [45] by varying the C 12 EO 4 concentration in 5 % ChEO 20 / H 2 O mixtures; and by Shrestha et al [49] by varying the C 16 EO 3 concentration for 15 wt.% LAD-TEA/water/C 16 EO 3 systems with fixed KBr content.…”