Low-dimensional phonon specific heat of titanium dioxide nanotubes

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

doi:10.1063/1.1990269

Low-dimensional phonon specific heat of titanium dioxide nanotubes

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

Materials Science and Engineering

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39 Scopus citations

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 language	English (US)
Article number	031901
Journal	Applied Physics Letters
Volume	87
Issue number	3
DOIs	https://doi.org/10.1063/1.1990269
State	Published - Jul 18 2005

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.1990269

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title = "Low-dimensional phonon specific heat of titanium dioxide nanotubes",

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.",

author = "C. Dames and B. Poudel and Wang, {W. Z.} and Huang, {J. Y.} and Ren, {Z. F.} and Y. Sun and Oh, {J. I.} and C. Opeil and Naughton, {M. J.} and G. Chen",

note = "Funding Information: The authors thank Prof. M. S. Dresselhaus for critical comments. This work was funded by DOE (FG02-02ER45977), the US Army Research Development and Engineering Command Natick Soldier Center (DAAD16-03-0052), NASA, and NSF (NIRT-0210533).",

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doi = "10.1063/1.1990269",

language = "English (US)",

volume = "87",

journal = "Applied Physics Letters",

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T1 - Low-dimensional phonon specific heat of titanium dioxide nanotubes

AU - Dames, C.

AU - Poudel, B.

AU - Wang, W. Z.

AU - Huang, J. Y.

AU - Ren, Z. F.

AU - Sun, Y.

AU - Oh, J. I.

AU - Opeil, C.

AU - Naughton, M. J.

AU - Chen, G.

N1 - Funding Information: The authors thank Prof. M. S. Dresselhaus for critical comments. This work was funded by DOE (FG02-02ER45977), the US Army Research Development and Engineering Command Natick Soldier Center (DAAD16-03-0052), NASA, and NSF (NIRT-0210533).

PY - 2005/7/18

Y1 - 2005/7/18

N2 - 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.

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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DO - 10.1063/1.1990269

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ER -

Low-dimensional phonon specific heat of titanium dioxide nanotubes

Abstract

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