5022 Temperature Measurement of Single-walled Carbon Nanotubes by Raman Scattering Measurement
Details
Raman scattering from various SWNTs (single-walled carbon nanotubes) samples were measured with three excitation laser wavelengths (488.0, 514.5 and 632.8nm) at various temperatures (4〜1000K). The G-band and D-band peaks showed clear temperature dependences: the downshift of Raman shift ; the broadening of peak width ; and the decrease of intensity with increase in temperature. The G^+ peak, which is the strongest peak in the G-band, showed the universal temperature dependence for three different excitation laser wavelengths and for various SWNTs samples. Hence, the temperature of SWNTs can be conveniently measured by Raman shift of the G^+ peak. With this temperature measurement technique by Raman scattering, in-situ temperature measurement of SWNTs during laser-heated CVD process was performed.
