Influences of temperature on the Raman spectra of single-walled carbon nanotubes

Abstract

The Raman spectra for single-walled carbon nanotubes (SWNTs) at different temperatures are studied. We find that the G peak position shifts to low frequency with increasing temperature. The variation rate of the peak frequency as a function of temperature is a factor of 2–3 larger than the corresponding values for multiwalled carbon nanotubes and highly ordered pyrolytic graphite from room temperature to 673 K. The line shapes of the radial breathing mode features are also found to be sensitive to temperature. Softening of the interatomic force constant due to thermal expansion of C–C bonds and relaxation of the weak van der Waals interaction between the SWNTs in a bundle with increasing temperature are suggested to be the main origins of the reversible spectral variations.

Vibration modeling of carbon-nanotube-based biosensors incorporating thermal and nonlocal effects

“…On the other hand, some studies have shown that the mechanical behaviors of carbon nanotube are sensitive to the thermal effect in the external environment (Ni et al, 2002;Zhang et al, 2006a;Zhang and Shen, 2006;Han, 2006 andZhang et al, 2007;Benzair et al, 2008;Tounsi et al, 2008;Murmu and Pradhan, 2009;Zidour et al, 2012). In particular, Zhang et al (2006a) studied the effect of temperature change on the Raman spectra of SWNTs by experiment. They found that the influence of thermal effects on the line shapes of the radial breathing mode features is significant.…”

Temperature dependent phonon renormalization in metallic nanotubes

“…Since SWNTs are at the center of nanotechnology research, a thorough investigation and understanding of the temperature effects on their Raman spectra is needed, especially in view of their foreseen application in high current nanodevices. Several groups reported changes of the Raman spectra of single-, doubleand multi-wall tubes as a function of T. Some focussed on the G band [5,6,7,8,9,10,11,12,13]. Others considered the position [5,6,7,8,11,12,14] and the intensity [14] of the Radial Breathing Modes (RBM).…”

“…Several groups reported changes of the Raman spectra of single-, doubleand multi-wall tubes as a function of T. Some focussed on the G band [5,6,7,8,9,10,11,12,13]. Others considered the position [5,6,7,8,11,12,14] and the intensity [14] of the Radial Breathing Modes (RBM). A few reported the temperature evolution of the 2D [5,13] and 2D' modes [5].…”

Development of carbon nanotubes for vacuum electronics application

“…Furthermore, in order to verify the single-walled structure of CNTs, Raman spectroscopy was performed (Figure 9 -3). The predominant peak located at 1587.6 cm -1 corresponded to G-band (C-C sp 2 bonds), while the weak peak at 1344.3 cm -1 was associated to D-band (C-C sp 3 bonds) [157], [206]. The obtained Raman spectra present the typical features of single wall CNTs [184].…”