Nanofluidics is the study of the behaviour, manipulation, and control of fluids that are confined to structures of nanometer characteristic dimensions. Various reasons may be found to motivate the development of Nanofluidics. From a biotechnological point of view, decreasing the scales considerably increases the sensitivity of analytic techniques. From a fluidic point of view, nanometric scales allow new fluidic functionalities to be developed, using the explicit benefit of the predominance of surfaces.