Heat capacity and vibrational spectra of monolayer films adsorbed in nanotubes

Ana Maria Vidales, Vincent Henry Crespi, Milton Walter Cole

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Carbon or boron nitride nanotubes can adsorb condensed-phase monolayer films on their inner surfaces. Examples include inert gas or hydrogen films, which form at low temperatures in nanotubes with radius (Formula presented) We study the phonon modes and thermodynamic properties of such films. Azimuthal quantization yields quasi-one-dimensional behavior at low temperature, manifested by a heat capacity linear in T, with quasi-two-dimensional behavior at higher temperature; the crossover between these regimes has a universal form, depending only on the ratio of the film radius to the thermal phonon wavelength. The film radius and mean sound speed can be extracted from the temperature dependence of the heat capacity.

Original languageEnglish (US)
Pages (from-to)R13426-R13429
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume58
Issue number20
DOIs
StatePublished - Jan 1 1998

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Vibrational spectra
vibrational spectra
Nanotubes
Specific heat
Monolayers
nanotubes
specific heat
radii
Noble Gases
Temperature
carbon nitrides
Carbon nitride
Boron nitride
boron nitrides
Inert gases
rare gases
Hydrogen
crossovers
Thermodynamic properties
thermodynamic properties

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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Heat capacity and vibrational spectra of monolayer films adsorbed in nanotubes. / Vidales, Ana Maria; Crespi, Vincent Henry; Cole, Milton Walter.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 58, No. 20, 01.01.1998, p. R13426-R13429.

Research output: Contribution to journalArticle

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AB - Carbon or boron nitride nanotubes can adsorb condensed-phase monolayer films on their inner surfaces. Examples include inert gas or hydrogen films, which form at low temperatures in nanotubes with radius (Formula presented) We study the phonon modes and thermodynamic properties of such films. Azimuthal quantization yields quasi-one-dimensional behavior at low temperature, manifested by a heat capacity linear in T, with quasi-two-dimensional behavior at higher temperature; the crossover between these regimes has a universal form, depending only on the ratio of the film radius to the thermal phonon wavelength. The film radius and mean sound speed can be extracted from the temperature dependence of the heat capacity.

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