Intertubular Interaction in Bundled Single-Walled Carbon Nanotubes Studied by Raman Scattering at a High Pressure and Temperature

Abstract

Raman spectra of bundled single-walled carbon nanotubes (SWCNTs) were measured at temperatures up to 730 K and pressures up to 7 GPa. The temperature- and pressure-induced shifts of Raman G₊ and G₋ bands are reversible while the dependence of the relative to the ambient conditions frequency Ω/Ω₀ versus the inverse relative variation of the triangular lattice constant A₀/A shows that the dilatation constant is not compatible with the compressibility constant.

Keywords:

• Carbon nanotubes
• high pressure
• Raman scattering

Acknowledgments

The support of the Russian Foundation for Basic Research, grant № 11-02-00886, is greatly acknowledged.