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CPP: Chemische Physik und Polymerphysik

CPP 30: POSTER: Chemical physics

CPP 30.36: Poster

Tuesday, March 8, 2005, 16:30–18:30, Poster TU D

Raman spectroscopy on metallic single-walled carbon nanotubes under electrochemical doping — •Peter Rafailov — Institut für Festkörperphysik der Technischen Universität Berlin, Sekr. PN 5-4, Hardenbergstr. 36, D-10623, Germany

We report a Raman investigation of the high-energy modes of metallic single-walled carbon nanotubes (SWNTs) upon electrochemical doping. We found these modes to be extremely sensitive to quite low doping levels which is manifested in large frequency shifts and dramatic intensity redistribution within the high-energy Raman band. These phenomena are explained by a possible removal of a Peierls-like instability that governs the softening of the high-energy modes in metallic carbon nanotubes.