Low-dimensional phonon specific heat of titanium dioxide nanotubes

C. Dames, Bed Poudel, W. Z. Wang, J. Y. Huang, Z. F. Ren, Y. Sun, J. I. Oh, C. Opeil, M. J. Naughton, G. Chen

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

The specific heat of multiwalled titanium dioxide (anatase phase) nanotubes has been measured between 1.5 and 95 K. Bulk anatase and rutile were also measured. The nanotube specific heat approaches that of bulk anatase at high temperatures. Below about 50 K the nanotube specific heat begins to show large enhancements compared to bulk. Using an isotropic elastic continuum model, this can be understood qualitatively as a transition to low-dimensional behavior. Below about 3 K there is a second transition and the nanotube specific heat becomes nearly constant, exceeding bulk anatase by an order of magnitude or more at 1.5 K.

Original languageEnglish (US)
Article number031901
JournalApplied Physics Letters
Volume87
Issue number3
DOIs
StatePublished - Jul 18 2005

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titanium oxides
anatase
nanotubes
specific heat
rutile
continuums
augmentation

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Dames, C., Poudel, B., Wang, W. Z., Huang, J. Y., Ren, Z. F., Sun, Y., ... Chen, G. (2005). Low-dimensional phonon specific heat of titanium dioxide nanotubes. Applied Physics Letters, 87(3), [031901]. https://doi.org/10.1063/1.1990269
Dames, C. ; Poudel, Bed ; Wang, W. Z. ; Huang, J. Y. ; Ren, Z. F. ; Sun, Y. ; Oh, J. I. ; Opeil, C. ; Naughton, M. J. ; Chen, G. / Low-dimensional phonon specific heat of titanium dioxide nanotubes. In: Applied Physics Letters. 2005 ; Vol. 87, No. 3.
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Dames, C, Poudel, B, Wang, WZ, Huang, JY, Ren, ZF, Sun, Y, Oh, JI, Opeil, C, Naughton, MJ & Chen, G 2005, 'Low-dimensional phonon specific heat of titanium dioxide nanotubes', Applied Physics Letters, vol. 87, no. 3, 031901. https://doi.org/10.1063/1.1990269

Low-dimensional phonon specific heat of titanium dioxide nanotubes. / Dames, C.; Poudel, Bed; Wang, W. Z.; Huang, J. Y.; Ren, Z. F.; Sun, Y.; Oh, J. I.; Opeil, C.; Naughton, M. J.; Chen, G.

In: Applied Physics Letters, Vol. 87, No. 3, 031901, 18.07.2005.

Research output: Contribution to journalArticle

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AU - Dames, C.

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AU - Wang, W. Z.

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AB - The specific heat of multiwalled titanium dioxide (anatase phase) nanotubes has been measured between 1.5 and 95 K. Bulk anatase and rutile were also measured. The nanotube specific heat approaches that of bulk anatase at high temperatures. Below about 50 K the nanotube specific heat begins to show large enhancements compared to bulk. Using an isotropic elastic continuum model, this can be understood qualitatively as a transition to low-dimensional behavior. Below about 3 K there is a second transition and the nanotube specific heat becomes nearly constant, exceeding bulk anatase by an order of magnitude or more at 1.5 K.

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