Continuation of 222A. Interparticle interactions, coagulation, DLVO theory, steric interactions, polymer- coated surfaces, polymers in solution, thin film viscosity. Surfactant and lipid self-assembly: micelles,microemulsions. Surfactants on surfaces: langmuir- blodgett films, adsorption, adhesion, friction. Biomolecular self-assembly, biological systems.