Paper Title:
Laser-Induced High Local Temperature in Carbon Nanotube
  Abstract

Laser irradiated carbon nanotubes in vacuum can emit dazzling yellow light due to the laser heating effect. We investigated the phonon frequency shifts of as irradiated carbon nanotube bundles by Raman spectroscopy under ultraviolet laser illumination (325 nm, 2.4 mW), the G band peak position was found to shift 50 cm-1 to lower wave number. By considering the temperature coefficient of the G band shift, the local temperature of the illuminated spot was predicted to be nearly 2000K. This temperature had a linear relationship with the incident laser power, and also was greatly influenced by the pressure of the vacuum chamber. The photoluminescence of the CNT bundle was also studied, which exhibits an oscillation of 0.1 eV, a possible origin of the oscillation was discussed.

  Info
Periodical
Solid State Phenomena (Volumes 121-123)
Edited by
Chunli BAI, Sishen XIE, Xing ZHU
Pages
331-336
DOI
10.4028/www.scientific.net/SSP.121-123.331
Citation
M. Liu, K.L. Jiang, Q.Q. Li, H.T. Yang, S.S. Fan, "Laser-Induced High Local Temperature in Carbon Nanotube", Solid State Phenomena, Vols. 121-123, pp. 331-336, 2007
Online since
March 2007
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Price
$32.00
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