2023/03/10 by Alex Kleiner, Kleiner, Alex
Engineering · Materials Science · Physics and Astronomy · #Carbon Nanotubes in Composites #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Nanopore and Nanochannel Transport Studies #Quantum and electron transport phenomena
paper · pdf · doi:10.48550/arxiv.2303.05934
openalex publication_date 2023/03/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.