Boosting DNA Recognition Sensitivity of Graphene Nanogaps through Nitrogen Edge Functionalization

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dc.contributor.authorAmorim, Rodrigo G.
dc.contributor.authorRocha, Alexandre R. [UNESP]
dc.contributor.authorScheicher, Ralph H.
dc.contributor.institutionUppsala University
dc.contributor.institutionUniversidade Federal Fluminense (UFF)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-12-11T17:05:29Z
dc.date.available2018-12-11T17:05:29Z
dc.date.issued2016-09-01
dc.description.abstractOne of the challenges for next generation DNA sequencing is to have a robust, stable, and reproducible nanodevice. In this work, we propose how to improve the sensing of DNA nucleobase using functionalized graphene nanogap as a solid state device. Two types of edge functionalization, namely, either hydrogen or nitrogen, were considered. We showed that, independent of species involved in the edge passivation, the highest-to-lowest order of the nucleobase transmissions is not altered, but the intensity is affected by several orders of magnitude. Our results show that nitrogen edge tends to p-dope graphene, and most importantly, it contributes with resonance states close to the Fermi level, which can be associated with the increased conductance. Finally, the translocation process of nucleobases passing through the nanogap was also investigated by varying their position from a certain height (from +3 to -3 Å) with respect to the graphene sheet to show that nitrogen-terminated sheets have enhanced sensitivity, as moving the nucleobase by approximately 1 Å reduces the conductance by up to 3 orders of magnitude.en
dc.description.affiliationDivision of Materials Theory Department of Physics and Astronomy Uppsala University, Box 516
dc.description.affiliationDepartamento de Física ICEx Universidade Federal Fluminense
dc.description.affiliationInstituto de Física Teórica Universidade Estadual Paulista (UNESP)
dc.description.affiliationUnespInstituto de Física Teórica Universidade Estadual Paulista (UNESP)
dc.description.sponsorshipSwedish Research Council
dc.format.extent19384-19388
dc.identifierhttp://dx.doi.org/10.1021/acs.jpcc.6b04683
dc.identifier.citationJournal of Physical Chemistry C, v. 120, n. 34, p. 19384-19388, 2016.
dc.identifier.doi10.1021/acs.jpcc.6b04683
dc.identifier.issn1932-7455
dc.identifier.issn1932-7447
dc.identifier.scopus2-s2.0-84984920625
dc.identifier.urihttp://hdl.handle.net/11449/173438
dc.language.isoeng
dc.relation.ispartofJournal of Physical Chemistry C
dc.relation.ispartofsjr2,135
dc.relation.ispartofsjr2,135
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.titleBoosting DNA Recognition Sensitivity of Graphene Nanogaps through Nitrogen Edge Functionalizationen
dc.typeArtigo
unesp.author.lattes4785631459929035[2]
unesp.author.orcid0000-0001-8874-6947[2]

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