Transport in hybrid electronic devices based on a modified DNA   nucleoside (deoxyguanosine)
  We report on a new class of hybrid electronic devices based on a DNA nucleoside (deoxyguanosine lipophilic derivative) whose assembled polymeric ribbons interconnect a submicron metallic gate. The device exhibits large conductivity at room temperature, rectifying behaviour and strong current-voltage hysteresis. The transport mechanism through the molecules is investigated by comparing films with different self-assembling morphology. We found that the main transport mechanism is connected to pi-pi interactions between guanosine molecules in adjacent ribbons, consistently with the results of our first-principles calculations. 
R. Rinaldi, E. Branca, R. Cingolani (Istituto Nazionale per la Fisica   della Materia (INFM) and Dipartimento di Ingegneria ...