Transport mechanism in granular Ni deposited on carbon nanotubes fibers

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dc.citation.firstpage115117en_US
dc.citation.journalTitlePhysical Review Ben_US
dc.citation.volumeNumber86en_US
dc.contributor.authorSalvato, M.en_US
dc.contributor.authorLucci, M.en_US
dc.contributor.authorOttaviani, I.en_US
dc.contributor.authorCirillo, M.en_US
dc.contributor.authorTamburri, E.en_US
dc.contributor.authorOrlanducci, S.en_US
dc.contributor.authorTerranova, M.L.en_US
dc.contributor.authorNotarianni, M.en_US
dc.contributor.authorYoung, C.C.en_US
dc.contributor.authorBehabtu, N.en_US
dc.contributor.authorPasquali, M.en_US
dc.contributor.orgRichard E. Smalley Institute for Nanoscale Science and Technologyen_US
dc.date.accessioned2013-03-27T15:43:07Zen_US
dc.date.available2013-03-27T15:43:07Zen_US
dc.date.issued2012en_US
dc.description.abstractWe investigate the transport properties of granular nickel electrodeposited on carbon nanotube fibers by measuring the electrical resistance and the current voltage characteristics as a function of the temperature. The bare fiber is governed by a three-dimensional variable range hopping transport mechanism, however, a semiconducting to metallic transition is observed after the Ni deposition as a consequence of the evolution from weak to strong coupling between the deposited nickel grains. The experimental results indicate that the charge transport in the Ni-coated fiber develops from hopping governed by the Coulomb blockade in the case of small grains dimensions to a metallic electron phonon interaction mechanism for large grains dimensions. Tunneling enhanced by thermal fluctuation is responsible for the transport in the intermediate conductivity range. The role of the fiber and the effects due to the magnetic nature of the nickel grains are also discussed.en_US
dc.embargo.termsnoneen_US
dc.identifier.citationSalvato, M., Lucci, M., Ottaviani, I., et al.. "Transport mechanism in granular Ni deposited on carbon nanotubes fibers." <i>Physical Review B,</i> 86, (2012) American Physical Society: 115117. http://dx.doi.org/10.1103/PhysRevB.86.115117.en_US
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevB.86.115117en_US
dc.identifier.urihttps://hdl.handle.net/1911/70849en_US
dc.language.isoengen_US
dc.publisherAmerican Physical Societyen_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.titleTransport mechanism in granular Ni deposited on carbon nanotubes fibersen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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