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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Topological Line Defects Around Graphene Nanopores for DNA Sequencing

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Author(s):
Prasongkit, Jariyanee [1, 2] ; Martins, Ernane de Freitas [3, 4] ; de Souza, Fabio A. L. [5] ; Scopel, Wanderla L. [6] ; Amorim, Rodrigo G. [7] ; Amornkitbamrung, Vittaya [8] ; Rocha, Alexandre R. [4] ; Scheicher, Ralph H. [3]
Total Authors: 8
Affiliation:
[1] Nakhon Phanom Univ, Fac Sci, Div Phys, Nakhon Phanom 48000 - Thailand
[2] Commiss Higher Educ, Thailand Ctr Excellence Phys, 328 Si Ayutthaya Rd, Bangkok 10400 - Thailand
[3] Uppsala Univ, Dept Phys & Astron, Div Mat Theory, SE-75120 Uppsala - Sweden
[4] Sao Paulo State Univ, UNESP, Inst Theoret Phys, Campus Sao Paulo, BR-01140070 Sao Paulo - Brazil
[5] Fed Inst Educ Sci & Technol Espirito Santo, BR-29395000 Ibatiba, ES - Brazil
[6] Univ Fed Espirito Santo, Dept Fis, BR-29075073 Vitoria, ES - Brazil
[7] UFF, ICEx, Dept Fis, BR-27213145 Volta Redonda, RJ - Brazil
[8] Khon Kaen Univ, Fac Sci, Integrated Nanotechnol Res Ctr, Dept Phys, Khon Kaen 40002 - Thailand
Total Affiliations: 8
Document type: Journal article
Source: Journal of Physical Chemistry C; v. 122, n. 13, p. 7094-7099, APR 5 2018.
Web of Science Citations: 3
Abstract

Topological line defects in graphene represent an ideal way to produce highly controlled structures with reduced dimensionality that can be used in electronic devices. In this work, we propose using extended line defects in graphene to improve nucleobase selectivity in nanopore-based DNA sequencing devices. We use a combination of quantum mechanics/molecular mechanics and nonequilibrium Green's function methods to investigate the conductance modulation, fully accounting for solvent effects. By sampling over a large number of different orientations generated from molecular dynamics simulations, we theoretically demonstrate that distinguishing between the four nucleobases using line defects in a graphene-based electronic device appears possible. The changes in conductance are associated with transport across specific molecular states near the Fermi level and their coupling to the pore. Through the application of a specifically tuned gate voltage, such a device would be able to discriminate the four types of nucleobases more reliably than that of graphene sensors without topological line defects. (AU)

FAPESP's process: 16/01343-7 - ICTP South American Institute for Fundamental Research: a regional center for theoretical physics
Grantee:Nathan Jacob Berkovits
Support Opportunities: Special Projects