What is the effect of Micellization on surface tension of water?

At the air/water surface, the surface micelles reduce surface tension by re-arranging the surfactant monolayer. Because of the steric repulsion between the two tails, adsorbed monolayer of the surfactants have a looser packing, in comparison with single-chain surfactants.

What is the critical micelle concentration of CTAB?

The CMC of CTAB is 0.0009 mol/L in water, while it is 0.24 mol/L in ethanol.

Are CTAB micelles flexible?

Under certain conditions, one-dimensional structures in the form of long, flexible wormlike micelles can develop. Cetyltrimethylammonium bromide (CTAB) is one of the most widely studied surfactants, and in the presence of sodium salicylate (NaSal), wormlike micelles can form at very dilute concentrations of surfactant.

Is CTAB a surfactant?

CTAB, [(C16H33)N(CH3)3Br], also known as cetyltrimethylammonium bromide; hexadecyltrimethylammonium bromide; and cetrimonium bromide is a cationic surfactant.

What is the mechanism of micelle formation?

Mechanism of micelle formation When soap is dissolved in water, it dissociates as RCOO− and Na+ ions. The RCOO− contain non-polar “tail” which is hydrophobic in nature and a polar “head” which is hydrophilic in nature. The COO− group present in water and hydrocarbon chain stay away from it.

How are CdS nanoparticles prepared?

CdS nanoparticles are prepared by the colloidal chemical precipitation method using cadmium acetate (CdCH 3 COOH), sodium sulfide (Na 2 S) as starting compounds and using thiophenol as capping agent. These compounds are weighed in a microbalance (M/s SICO, India).

How do you dissolve CTAB?

CTAB/NaCl solution. Dissolve 4.1 gram NaCl (Merck, p.a.) in 80 mL distilled water. While stirring, add 10 gram N-cetyl-N,N,N,-trimethyl ammonium bromide (CTAB) (Merck, p.a.). To dissolve heat the solution at 65 °C.

How do you dissolve CTAB powder?

CTAB is Hexadecyltrimethylammonium bromide. Dissolve it before adding NaCl, with stirring and a little warmth, if necessary. When the NaCl is dissolved, lots of tiny bubbles come out of solution; they rise to the surface very slowly, simulating undissolved material.