Fabrication of a synthetic nanopore ion pump

Phys Rev Lett. 2002 Nov 4;89(19):198103. doi: 10.1103/PhysRevLett.89.198103. Epub 2002 Oct 18.


We present a synthetic nanodevice, which transports potassium ions against their concentration gradient if stimulated with external field fluctuations. It consists of a single, conical pore, created in a thin polyethylene terephthalate film. The pumping mechanism is similar to one of longitudinally oscillating deterministic ratchets.