Stability of carbon nanotubes to laser irradiation probed by Raman spectroscopy

作者：Olevik D; Soldatov A V^*; Dossot M; Vigolo B; Humbert B; McRae E

来源：Physica Status Solidi B-Basic Solid State Physics, 2008, 245(10): 2212-2215.

DOI：10.1002/pssb.200879661

We report on a systematic study of the influence of laser irradiation on the Raman spectra of HiPco-produced single, wall CNTs. Specifically, we have examined the Raman response of bundled CNTs to: i) laser power density; ii) exposure time and iii) photon energy (1.96 and 2.33 eV). Our results show that irreversible destruction of CNTs in the bundles can occur at even low laser power density (0.15 kW/cm(2)). The tubes with smaller diameters are influenced first and the rate of CNT destruction increases with photon energy. Finally, we determined that when investigating destruction of CNT bundles, the use of a low laser power density is required because changes in the structure of the bundles can lead to sample temperature changes for otherwise identical measurement parameters.

• 出版日期2008-10