Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/11039
Title: Self-Aligning Nanojunctions for Integrated Single-Molecule Circuits
Authors: Liu, B.
Demir, B.
Gultakti, C.A.
Marrs, J.
Gong, Y.
Li, R.
Oren, E.E.
Keywords: biosensors
carbon nanotubes
molecular devices
nanoelectronics
nanojunction
self-alignment
single-molecule electronics
Biosensors
Electrodes
Electronic properties
Graphene
Integration
Lithography
Nanoelectronics
Nanoribbons
Nanotubes
Oligonucleotides
Timing circuits
Graphene nanoribbons
Higher yield
Metallic single-walled carbon nanotubes
Molecular device
Nano scale
Nanojunctions
Self-aligning
Self-alignment
Single molecule
Single-molecule electronics
DNA
Issue Date: 2023
Publisher: American Chemical Society
Abstract: Robust, high-yield integration of nanoscale components such as graphene nanoribbons, nanoparticles, or single-molecules with conventional electronic circuits has proven to be challenging. This difficulty arises because the contacts to these nanoscale devices must be precisely fabricated with angstrom-level resolution to make reliable connections, and at manufacturing scales this cannot be achieved with even the highest-resolution lithographic tools. Here we introduce an approach that circumvents this issue by precisely creating nanometer-scale gaps between metallic carbon electrodes by using a self-aligning, solution-phase process, which allows facile integration with conventional electronic systems with yields approaching 50%. The electrode separation is controlled by covalently binding metallic single-walled carbon nanotube (mCNT) electrodes to individual DNA duplexes to create mCNT-DNA-mCNT nanojunctions, where the gap is precisely matched to the DNA length. These junctions are then integrated with top-down lithographic techniques to create single-molecule circuits that have electronic properties dominated by the DNA in the junction, have reproducible conductance values with low dispersion, and are stable and robust enough to be utilized as active, high-specificity electronic biosensors for dynamic single-molecule detection of specific oligonucleotides, such as those related to the SARS-CoV-2 genome. This scalable approach for high-yield integration of nanometer-scale devices will enable opportunities for manufacturing of hybrid electronic systems for a wide range of applications. © 2024 American Chemical Society.
URI: https://doi.org/10.1021/acsnano.3c10844
https://hdl.handle.net/20.500.11851/11039
ISSN: 1936-0851
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

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