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. Author manuscript; available in PMC: 2016 Jul 21.
Published in final edited form as: Analyst. 2015 May 19;140(14):4779–4791. doi: 10.1039/c5an00075k

Fig. 5.

Fig. 5

Schematic of an asymmetric nanopore with negative surface charge. Arrows show direction of cation flux in high and low conductance states (G), which, when present, leads to ion current rectification. Figure adapted with permission from Kovarik et al.112 Copyright 2009 American Chemical Society.