Surfaces and interfaces. Physical and chemical properties of interfaces. Thermodynamics of surfaces. Adsorption phenomena. Aggregates of surfactants in solutions. Micelles, Microemulsions. Electric properties of interfaces. Dispersed systems. Stability of dispersed systems. Nanoparticles and nanostructured systems. Environmental applications of dispersed and nanostructrured systems. Microscopy and spectroscopy methods to investigate interfaces and nanomaterials.