DNA - Nanoelectronics: Realization of a Single Electron Tunneling   Transistor and a Quantum Bit Element
  Based on the understanding that chemical bonds can act as tunnel junctions in the Coulomb blockade regime, and on the technical ability to coat a DNA strand with metal, we suggest that DNA can be used to built logical devices. We discuss two explicit examples: a Single Electron Tunneling Transistor (SET) and a Quantum Bit Element. These devices would be literally in the nano-meter scale and would be able to operate at room temperature. In addition they would be identical to each other, highly stable and would have a self assembly property. 
Eshel Ben-Jacob, Ziv Hermon and Shay Caspi