Nanopore and tunneling resonance in an open kink in carbon nanotubes

In weakly buckled carbon nanotubes, the kink is an open, ovalized constriction where molecular-sized analytes and ions can pass. Moreover, in semiconducting tubes, the kink has an electronic bound state within the bandgap. This state is localized, hence highly susceptible to electrostatic perturbati...

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Bibliographic Details
Published in:arXiv.org 2023-03
Main Author: Kleiner, Alex
Format: Article
Language:English
Subjects:
Bending
Carbon nanotubes
Electron tubes
Perturbation
Postbuckling
Resonance
Online Access:Get full text
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Summary:In weakly buckled carbon nanotubes, the kink is an open, ovalized constriction where molecular-sized analytes and ions can pass. Moreover, in semiconducting tubes, the kink has an electronic bound state within the bandgap. This state is localized, hence highly susceptible to electrostatic perturbation by a proximate, itinerant ion. The degree to which this perturbation will modulate the electronic current, which is our signal, can be maximized in a tunnel-junction set-up, near resonance. We thus propose such a device, analyze its performance and, since the bound state depends on the post-buckling bending, suggest a scalable fabrication method to achieve bending and buckling of carbon nanotubes to an adjustable degree.
ISSN:2331-8422