Patent ID: 7708871

Claim:
An apparatus comprising: a nanodevice for controlling the flow of charged particles, wherein the nanodevice comprises a polymeric foil and at least one preferentially asymmetric pore forming a via hole through said foil, wherein said pore provides a narrow opening of a diameter in the range of several nanometers down to about one nanometer on a front side of said foil and a wide opening in the range of several ten nanometers up to several hundred nanometers on a back side of said foil, and wherein an electrically conductive layer surrounds said narrow opening on said front side; an electrolytic bath container that is divided by said polymeric foil into a first and a second compartment, wherein each of the first and second compartment comprises an electrode connected to a direct current voltage (U 1 ) supply; and a gate voltage (U 2 ) supply connected to said electrically conductive layer on said front side of said foil controlling the flow of charged particles within said nanodevice from said first compartment to said second compartment and vice versa.