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Low temperature electrical transport in microwave plasma fabricated free-standing graphene and N-graphene sheets

2023-02Artigo científico Acesso aberto
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dc.contributor.authorValcheva, E.
dc.contributor.authorKirilov, K.
dc.contributor.authorBundaleska, N.
dc.contributor.authorDias, A.
dc.contributor.authorFelizardo, E.
dc.contributor.authorAbrashev, M.
dc.contributor.authorBundaleski, N.
dc.contributor.authorTeodoro, O. M. N. D.
dc.contributor.authorStrunskus, Th
dc.contributor.authorKiss’ovski, Zh
dc.contributor.authorAlves, L. L.
dc.contributor.authorTatarova, E.
dc.contributor.institutionCeFITec – Centro de Física e Investigação Tecnológica
dc.contributor.institutionDF – Departamento de Física
dc.contributor.pblInstitute of Physics Publishing
dc.date.accessioned2023-07-10T22:16:42Z
dc.date.available2023-07-10T22:16:42Z
dc.date.issued2023-02
dc.descriptionFunding Information: The authors would like to thank S. Russev for the SEM images. M A, E V, K K and Zh K thank the European Regional Development Fund within the Operational Programme ‘Science and Education for Smart Growth 2014–2020’ under the Project CoE ‘National center of mechatronics and clean technologies ‘BG05M2OP001-1.001-0008’. Publisher Copyright: © 2023 The Author(s). Published by IOP Publishing Ltd.
dc.description.abstractIn this paper, the electrical transport in free-standing graphene and N-graphene sheets fabricated by a microwave plasma-based method is addressed. Temperature-dependent resistivity/conductivity measurements are performed on the graphene/N-graphene sheets compressed in pellets. Different measurement configurations reveal directional dependence of current flow—the room-temperature conductivity longitudinal to the pellet’s plane is an order of magnitude higher than the transversal one, due to the preferential orientation of graphene sheets in the pellets. SEM imaging confirms that the graphene sheets are mostly oriented parallel to the pellet’s plane and stacked in agglomerates. The high longitudinal electrical conductivity with values on the order of 103 S/m should be noted. Further, the current flow mechanism revealed from resistivity-temperature dependences from 300K down to 10K shows non-metallic behavior manifested with an increasing resistivity with decreasing the temperature d ρ / d T < 0 usually observed for insulating or localized systems. The observed charge transport shows variable range hopping at lower temperatures and thermally activated behaviour at higher temperatures. This allows us to attribute the charge transport mechanism to a partially disordered system in which single graphene sheets are placed predominantly parallel to each other and stacked together.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent11
dc.format.extent910864
dc.identifier.doi10.1088/2053-1591/acb7ca
dc.identifier.issn2053-1591
dc.identifier.otherPURE: 65459969
dc.identifier.otherPURE UUID: 65187168-dde3-4956-9d20-62672751bbbd
dc.identifier.otherScopus: 85148011638
dc.identifier.otherWOS: 000935625800001
dc.identifier.otherORCID: /0000-0002-3424-2847/work/151385471
dc.identifier.urihttp://hdl.handle.net/10362/155065
dc.identifier.urlhttps://www.scopus.com/pages/publications/85148011638
dc.language.isoeng
dc.peerreviewedyes
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/766894/EU
dc.relationPlasma Enabled and Graphene Allowed Synthesis of Unique nano Structures
dc.relationInstitute for Plasmas and Nuclear Fusion
dc.relationInstitute for Plasmas and Nuclear Fusion
dc.subjectfree-standing graphene sheets
dc.subjectlow temperature conduction mechanism
dc.subjectmicrowave plasma-based synthesis
dc.subjectN-doping
dc.subjectvariable range hopping
dc.subjectElectronic, Optical and Magnetic Materials
dc.subjectBiomaterials
dc.subjectSurfaces, Coatings and Films
dc.subjectPolymers and Plastics
dc.subjectMetals and Alloys
dc.titleLow temperature electrical transport in microwave plasma fabricated free-standing graphene and N-graphene sheetsen
dc.typejournal article
degois.publication.issue2
degois.publication.titleMaterials Research Express
degois.publication.volume10
dspace.entity.typePublication
oaire.awardNumber766894
oaire.awardNumberPTDC/NAN-MAT/30565/2017
oaire.awardNumberUIDB/50010/2020
oaire.awardNumberUIDP/50010/2020
oaire.awardTitlePlasma Enabled and Graphene Allowed Synthesis of Unique nano Structures
oaire.awardTitleInstitute for Plasmas and Nuclear Fusion
oaire.awardTitleInstitute for Plasmas and Nuclear Fusion
oaire.awardURIinfo:eu-repo/grantAgreement/EC/H2020/766894/EU
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/Concurso para Financiamento de Projetos de Investigação Científica e Desenvolvimento Tecnológico em Todos os Domínios Científicos - 2017/PTDC%2FNAN-MAT%2F30565%2F2017/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50010%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50010%2F2020/PT
oaire.fundingStreamH2020
oaire.fundingStreamConcurso para Financiamento de Projetos de Investigação Científica e Desenvolvimento Tecnológico em Todos os Domínios Científicos - 2017
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
project.funder.identifierhttp://doi.org/10.13039/501100008530
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameEuropean Commission
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
relation.isProjectOfPublicationdac8b337-df88-4650-a780-37e53397c5aa
relation.isProjectOfPublication346fd0ee-6354-422a-aee6-f52adefa345d
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relation.isProjectOfPublication96d208e3-d19f-4b04-8378-e34e4e1f201f
relation.isProjectOfPublication.latestForDiscoverydac8b337-df88-4650-a780-37e53397c5aa

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