Research Papers

Phonon frequency distribution function and temperature variation of Rayleigh Mössbauer scattering fraction from aligned multiwalled carbon nanotubes

[+] Author Affiliations
Poonam Silotia, Seema Dabas, Aditya Saxena, Shri-Prakash Tewari

University of Delhi, Department of Physics and Astrophysics, Delhi-110007, India

J. Nanophoton. 5(1), 053508 (May 17, 2011). doi:10.1117/1.3590198
History: Received December 16, 2010; Revised April 14, 2011; Accepted April 15, 2011; Published May 17, 2011; Online May 17, 2011
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The phonon frequency distribution function (FDF) of aligned multiwalled carbon nanotubes (MWNTs) was obtained by unfolding its observed temperature variation of specific heat in the temperature range 1.8 to 250 K. An anisotropic dynamical model which incorporates the presence of two-dimensional modes on the surface of the tube and the intertube coupling was used as a trial function to carry out the unfolding process numerically. Temperature variation of Rayleigh Mössbauer scattering fraction of Sn-119 gamma-photons was computed using the trial and final FDF of MWNT. The temperature variation of Rayleigh Mössbauer scattering fraction in each case is quite marked and can be observed experimentally.

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© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation

Poonam Silotia ; Seema Dabas ; Aditya Saxena and Shri-Prakash Tewari
"Phonon frequency distribution function and temperature variation of Rayleigh Mössbauer scattering fraction from aligned multiwalled carbon nanotubes", J. Nanophoton. 5(1), 053508 (May 17, 2011). ; http://dx.doi.org/10.1117/1.3590198


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