This lecture covers the critical micelle concentration (CMC) of hexane, the influence of salt on CMC, the structure of aggregates determined by intermolecular forces, the packing parameter of amphiphiles, and the shapes of aggregates. It also discusses the aspect ratio's impact on aggregate shape, the packing parameter of spheres, and examples of aggregates like sodium dodecyl sulfate. Additionally, it explores how to make elliptical micelles spherical and the applications of micelles as delivery vehicles for hydrophobic ingredients.