Journal
ACS NANO
Volume 7, Issue 1, Pages 547-555Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn304695y
Keywords
metallic nanopores; charge transfer resistance; ionic current rectification; multielectrode arrangement; electrode cross-coupling
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Funding
- European Research Council Starting Investigator grant
- Leverhulme Trust research grant
- EPSRC [EP/H046593/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/H046593/1] Funding Source: researchfish
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Solid-state nanopores with integrated electrodes have interesting prospects in next-generation single-molecule biosensing and sequencing. These include gated nanopores with a single electrode integrated into the membrane, as well as two-electrode designs, such as a transversal tunneling junction. Here we report the first comprehensive analysis of current flow in a three-electrode device as a model for this class of sensors. As a new feature, we observe apparent rectification in the pore current that is rooted In the current distribution of the cell, rather than the geometry or electrostatics of the pore. We benchmark our results against a recently developed theoretical model and define operational parameters for nanopore/electrode structures. Our findings thus facilitate the rational design of such sensor devices.
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