Abstract
We study the effects of different nanopore geometries (double-conical, single-conical,cylindrical) on the electrostatic potential distribution and ionic conductivity in adouble-layered semiconductor nanopore device as functions of the applied membrane bias.Ionic current–voltage characteristics as well as their rectification ratios are calculated usinga simple ion transport model. Based on our calculations, we find that the double-layeredsemiconductor membrane with a single-conical nanopore with a narrow opening in the n-Silayer exhibits the largest range of available potential variations in the pore and, thus,may be better suited for control of polymer translocation through the nanopore.
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