Micelles are aggregates of surfactant molecules dispersed in a liquid. The surfactant molecules have a dual affinity; they possess both a hydrophilic (water-attracting) head and a hydrophobic (water-repelling) tail. When the concentration of surfactants exceeds the critical micelle concentration (CMC), these molecules spontaneously form micelles with their hydrophobic tails inward and hydrophilic heads outward.
