Charge transfer via interfaces, especially of nanoscale materials

Nanoscale materials and their properties are mainly defined by the interfac e material and its properties. The charge transfer in those materials, i.e. , across and along interfaces is complex. In contrast to classical charge t ransfer via direct tunneling dying away quickly in 0.5 nm, most charges are transferred at interfaces via resonant tunneling and higher-order intermed iate state tunneling bridging 2-25 nm. The basic concepts of this incoheren t charge transfer are presented and known intermediate states are elucidate d and model systems are discussed.