Structural properties of pristine and fluorinated double-walled carbon nanotubes under high pressure

In situ Raman scattering measurements of pristine and fluorinated double-walled carbon nanotube samples under high pressure have been performed. Due to the mechanical shielding effect of the outer tubes of the double-walls to the applied pressure, the Raman scattering lines from the inner tubes of both samples remained to be observed even at high pressure. (C) 2007 Elsevier Ltd. All rights reserved.