Journal
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
Volume 76, Issue 5, Pages 781-785Publisher
SPRINGER
DOI: 10.1007/s00339-002-1982-7
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For the preparation of a single asymmetrically shaped nanopore in a polyimide membrane, Kapton foils were irradiated with single heavy ions and subsequently etched from one side in sodium hypochlorite (NaOCl). The other side of the membrane was protected from etching by a stopping medium containing a reducing agent for hypochlorite ions (OCl-). The resulting conical nanopore rectified ion current and exhibited a stable ion-current flow.
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