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Silicene as a new potential DNA sequencing device
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
2015 (English)In: Nanotechnology, ISSN 0957-4484, E-ISSN 1361-6528, Vol. 26, no 15, 154002Article in journal (Refereed) Published
Abstract [en]

Silicene, a hexagonal buckled 2D allotrope of silicon, shows potential as a platform for numerous new applications, and may allow for easier integration with existing silicon-based microelectronics than graphene. Here, we show that silicene could function as an electrical DNA sequencing device. We investigated the stability of this novel nano-bio system, its electronic properties and the pronounced effects on the transverse electronic transport, i.e., changes in the transmission and the conductance caused by adsorption of each nucleobase, explored by us through the non-equilibrium Green's function method. Intriguingly, despite the relatively weak interaction between nucleobases and silicene, significant changes in the transmittance at zero bias are predicted by us, in particular for the two nucleobases cytosine and guanine. Our findings suggest that silicene could be utilized as an integrated-circuit biosensor as part of a lab-on-a-chip device for DNA sequencing.

Place, publisher, year, edition, pages
2015. Vol. 26, no 15, 154002
Keyword [en]
electronic transport, adsorption, nucleobases, 2D material, Dirac material
National Category
Nano Technology
Identifiers
URN: urn:nbn:se:uu:diva-252683DOI: 10.1088/0957-4484/26/15/154002ISI: 000352636100002PubMedID: 25797645OAI: oai:DiVA.org:uu-252683DiVA: diva2:813995
Funder
Swedish Research Council, 621-2009-3628
Available from: 2015-05-25 Created: 2015-05-11 Last updated: 2017-12-04Bibliographically approved

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Scheicher, Ralph H.

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