dc.contributor.author | Gao, Tao | |
dc.contributor.author | Jelle, Bjørn Petter | |
dc.date.accessioned | 2017-11-24T11:59:59Z | |
dc.date.available | 2017-11-24T11:59:59Z | |
dc.date.created | 2013-01-04T01:45:55Z | |
dc.date.issued | 2013 | |
dc.identifier.citation | Journal of Physical Chemistry C. 2013, 117 1401-1408. | nb_NO |
dc.identifier.issn | 1932-7447 | |
dc.identifier.uri | http://hdl.handle.net/11250/2468011 | |
dc.description.abstract | Thermal conductivity of TiO2 nanotubes prepared from a NaOH treatment of TiO2 particles with subsequent acid washing and annealing has been investigated. The obtained TiO2 nanotubes have a tetragonal anatase structure, and have a typical inner diameter of about 4–5 nm, wall thickness of about 2–3 nm, and length up to several hundred nanometers. TiO2 nanotubes show a significantly reduced thermal conductivity of about 0.40–0.84 W/(m·K) (average 0.62 W/(m.K)) at room temperature, as compared to about 8.5 W/(m·K) for the bulk TiO2 materials. The great suppression in thermal conductivity can be understood by means of increased phonon-boundary scattering and enhanced phonon confinement in TiO2 nanotubes with unique nanotubular morphology, small featured sizes, and large surface area (∼258 m2/g). A theoretical analysis including the surface scattering and size confinement effects of phonon transport in TiO2 nanotubes is also reported, which results in an intrinsic thermal conductivity of 0.30–0.77 W/(m·K) (average 0.54 W/(m.K)) for individual TiO2 nanotubes with wall thickness of 2–3 nm, in harmony with the experimental values. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | American Chemical Society | nb_NO |
dc.title | Thermal Conductivity of TiO2 Nanotubes | nb_NO |
dc.type | Journal article | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | publishedVersion | nb_NO |
dc.source.pagenumber | 1401-1408 | nb_NO |
dc.source.volume | 117 | nb_NO |
dc.source.journal | Journal of Physical Chemistry C | nb_NO |
dc.identifier.doi | 10.1021/jp3108655 | |
dc.identifier.cristin | 980540 | |
dc.relation.project | Norges forskningsråd: 193830 | nb_NO |
dc.description.localcode | This article will not be available due to copyright restrictions (c) 2013 by American Chemical Society | nb_NO |
cristin.unitcode | 194,61,25,0 | |
cristin.unitcode | 194,64,35,0 | |
cristin.unitname | Institutt for byggekunst, historie og teknologi | |
cristin.unitname | Institutt for bygg, anlegg og transport | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |