Isotropic Seebeck coefficient of aligned single-wall carbon nanotube films

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dc.citation.articleNumber243105en_US
dc.citation.issueNumber24en_US
dc.citation.journalTitleApplied Physics Lettersen_US
dc.citation.volumeNumber113en_US
dc.contributor.authorFukuhara, Kengoen_US
dc.contributor.authorIchinose, Yotaen_US
dc.contributor.authorNishidome, Hiroyukien_US
dc.contributor.authorYomogida, Yoheien_US
dc.contributor.authorKatsutani, Fumiyaen_US
dc.contributor.authorKomatsu, Natsumien_US
dc.contributor.authorGao, Weiluen_US
dc.contributor.authorKono, Junichiroen_US
dc.contributor.authorYanagi, Kazuhiroen_US
dc.date.accessioned2019-01-18T17:51:31Zen_US
dc.date.available2019-01-18T17:51:31Zen_US
dc.date.issued2018en_US
dc.description.abstractHow the morphology of a macroscopic assembly of nanoobjects affects its properties is a long-standing question in nanomaterials science and engineering. Here, we examine how the thermoelectric properties of a flexible thin film of carbon nanotubes depend on macroscopic nanotube alignment. Specifically, we have investigated the anisotropy of the Seebeck coefficient of aligned and gated single-wall carbon nanotube thin films. We varied the Fermi level in a wide range, covering both theﾠp-type andﾠn-type regimes, using electrolyte gating. While we found the electrical conductivity along the nanotube alignment direction to be several times larger than that in the perpendicular direction, the Seebeck coefficient was found to be fully isotropic, irrespective of the Fermi level position. We provide an explanation for this striking difference in anisotropy between the conductivity and the Seebeck coefficient using Mott's theory of hopping conduction. Our experimental evidence for an isotropic Seebeck coefficient in an anisotropic nanotube assembly suggests a route toward controlling the thermoelectric performance of carbon nanotube thin films through morphology control.en_US
dc.identifier.citationFukuhara, Kengo, Ichinose, Yota, Nishidome, Hiroyuki, et al.. "Isotropic Seebeck coefficient of aligned single-wall carbon nanotube films." <i>Applied Physics Letters,</i> 113, no. 24 (2018) AIP Publishing LLC: https://doi.org/10.1063/1.5066021.en_US
dc.identifier.doihttps://doi.org/10.1063/1.5066021en_US
dc.identifier.urihttps://hdl.handle.net/1911/105108en_US
dc.language.isoengen_US
dc.publisherAIP Publishing LLCen_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.titleIsotropic Seebeck coefficient of aligned single-wall carbon nanotube filmsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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