Sphere micelles

Rod-like micelles of surfactant molecules with a liquid-crystalline order. The aqueous solution is located between the micelles. Spheres = hydrophilic ends of the surfactant molecules, black zigzag lines = long alkyl groups... 

Figure 2 Illustration of a negatively charged biomolecular surface with charge density a in the presence of a mixed electrolyte. The surface may represent that of a colloidal or biophysical particle such as a membrane (plane), polynucleic acid (cylinder), or micelle (sphere) where the distance of closest approach of ions is designated x — a. n the solution of the Gouy-Chapman equation, and of the Poisson-Boltzmann equation in general, the charged surface is usually displaced from its actual position (relative to the solvent) to the plane of closest approach of nonadsorbed ions, also called the outer Helmholtz plane.

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