Low-temperature specific heat of single-wall carbon nanotubes. (CROSBI ID 95048)
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Lasjaunias, Jean-Claude ; Biljaković, Katica ; Beneš, Zdenek ; Fischer E Jack
engleski
Low-temperature specific heat of single-wall carbon nanotubes.
Previous low-temperature heat capacity measurements down to 2 K by Hone et al. (2000) give evidence for 1-D quantum confinement of SWNT vibrational modes. We extended the data on the same sample down to 0.1 K. A good fit is obtained up to 4 K with C/sub p/=C/sub n/T/sup -2/+0.043T/sup 0.62/+0.035 T/sup 3/ mJ/gK, where the T/sup -2/ term is from nuclear hyperfine interactions in ferromagnetic impurities and the T/sup 3/ term originates from intertube coupling in agreement with Hone et al (2000). The origin of the T/sup 0.62/ term is unknown. Comparison with the vibrational density of states from inelastic neutron scattering is made.
nanotubes; thermal properties; adsorption
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