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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).