What are micelles? Give an example of a micellar system.

(N/A) Micelles are spherical aggregates formed by surfactant molecules (like soaps and detergents) in a solvent when their concentration exceeds the Critical Micelle Concentration $(CMC)$.
These molecules possess a dual nature: a long hydrophobic hydrocarbon tail and a hydrophilic polar head.
In water,they arrange themselves into spherical structures where the hydrophobic tails are directed towards the centre (away from water) and the hydrophilic heads are directed towards the outside (towards water).
Example: Sodium stearate $(C_{17}H_{35}COO^{-}Na^{+})$ in water.