Conical Nanopore Membranes: Controlling the Nanopore Shape

Conically shaped nanopores prepared by anisotropic etching of heavy-ion-tracked polymer films are an especially promising type of abiotic nanopore for biosensing applications. We have discovered that the cone angle of conical nanopores (see Figure) prepared by the track-etch method can be systematically varied by varying the transmembrane potential difference applied during pore etching.