24 August 2010 Phonon frequency distribution function in aligned multi-walled carbon nanotubes
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It is shown that it is possible to obtain the phonon frequency distribution function (FDF) of aligned multi-walled carbon nanotubes (MWNT) by unfolding its temperature variation of specific heat in the temperature range 1.8-250 K. An anisotropic dynamical model which takes into account the presence of two-dimensional modes on the surface of the tube and the intertube coupling has been used as a trial function to carry out the unfolding process numerically. The aligned MWNT sample turns out to be somewhat similar to graphite.
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Poonam Silotia, Seema Dabas, Aditya Saxena, S. P. Tewari, "Phonon frequency distribution function in aligned multi-walled carbon nanotubes", Proc. SPIE 7761, Carbon Nanotubes, Graphene, and Associated Devices III, 77610T (24 August 2010); doi: 10.1117/12.867993; https://doi.org/10.1117/12.867993

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