ABSTRACT
One of the most important aspects at nanoscale concerns the charge transport, which can be influenced by particles dimensions and assume different characteristics with respect to those of bulk. A rigorous knowledge of transport properties is to be acquired. From a theoretical point of view, various techniques can be used for the comprehension of transport phenomenon; particularly powerful are the analytical descriptions based on transport equations. Quantum effects in the nanoworld have opened new ways in many old and new technological sectors. The chapter offers an overview of fundamental models that, starting from the Drude model, analyse and explain the transport phenomenon of the matter at the nanoscale, coming to developments concerning variations of Drude–Lorentz-like models. In the Drude model, the valence electrons of atoms are considered free inside the metal; all electrons move as an electronic gas.
