Dresden 2006 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 2: Colloids and Nanoparticles
CPP 2.6: Vortrag
Montag, 27. März 2006, 11:30–11:45, ZEU 160
Raman scattering on double-wall carbon nanotubes under high pressure — •Matthias Müller1, Janina Maultzsch1, Ferenc Simon2, and Christian Thomsen1 — 1Inst. für Festkörperphysik, TU Berlin, 10623 Berlin — 2Inst. für Materialphysik, Universität Wien, A-1090 Wien
We report resonant Raman scattering on double-wall carbon nanotubes. The effects of applied pressure up to several GPa on the radial breathing modes and the high energy modes are studied. We investigated either structures with 12C or 13C isotopes used for the production of the inner tube. From the radial breathing modes we can assign the chiral index of the tubes[1]. Pressure shielding by the outer tubes was suggested by Arvanitidis et al.[2]. Using the 12C or 13C tube samples, we assign the Raman signal to inner and outer tube. We can therefore distinguish the possibly different effect of pressure on either inner or outer tube.
[1] Telg et al., Phys. Rev. Lett. 93, 177401 (2004). [2] Arvanitidis et al., Phys. Rev. B 71, 125404 (2005).