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Nano-structured interface of graphene and h-BN for sensing applications
UFES, Dept Fis, Vitoria, ES, Spain..
UFF, ICEx, Dept Fis, Volta Redonda, RJ, Brazil..
UFES, Dept Fis, Vitoria, ES, Spain.;UFF, ICEx, Dept Fis, Volta Redonda, RJ, Brazil..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
2016 (English)In: Nanotechnology, ISSN 0957-4484, E-ISSN 1361-6528, Vol. 27, no 36, 365503Article in journal (Refereed) Published
Abstract [en]

The atomically-precise controlled synthesis of graphene stripes embedded in hexagonal boron nitride opens up new possibilities for the construction of nanodevices with applications in sensing. Here, we explore properties related to the electronic structure and quantum transport of a graphene nanoroad embedded in hexagonal boron nitride, using a combination of density functional theory and the non-equilibrium Green's functions method to calculate the electric conductance. We find that the graphene nanoribbon signature is preserved in the transmission spectra and that the local current is mainly confined to the graphene domain. When a properly sized nanopore is created in the graphene part of the system, the electronic current becomes restricted to a carbon chain running along the border with hexagonal boron nitride. This circumstance could allow the hypothetical nanodevice to become highly sensitive to the electronic nature of molecules passing through the nanopore, thus opening up ways to detect gas molecules, amino acids, or even DNA sequences based on a measurement of the real-time conductance modulation in the graphene nanoroad.

Place, publisher, year, edition, pages
2016. Vol. 27, no 36, 365503
Keyword [en]
nanosensor, hybrid graphene/h-BN device, density functional theory, electronic transport, nanopore, nanoroad
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:uu:diva-306270DOI: 10.1088/0957-4484/27/36/365503ISI: 000384064400018PubMedID: 27485857OAI: oai:DiVA.org:uu-306270DiVA: diva2:1040180
Funder
Carl Tryggers foundation Swedish Research Council, Swedish Research Council (VR) 621-2009-3628
Available from: 2016-10-26 Created: 2016-10-26 Last updated: 2016-10-26Bibliographically approved

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Scheicher, Ralph H.
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