EFFECT OF TEMPERATURE CHANGE ON THE RADIAL BREATHING MODE FREQUENCY OF SINGLE-WALLED CARBON NANOTUBES

Abstract

In this paper, the effect of environmental temperature on the radial breathing mode (RBM) frequency of single-walled carbon nanotubes (SWNTs) with arbitrary chirality is investigated. The analytical formulation is developed which can link the frequency to the geometrical parameters of the SWCNT and environmental temperature. Good agreement between the present results and existing experimental data is found. The results show that the predicted RBM frequencies of the SWCNTs decrease with increasing of temperature. The softening of the C–C force constants in the SWCNT is responsible for the temperature-induced downshift in the RBM frequencies.