Regensburg 2007 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 16: Colloids and Nanoparticles III

CPP 16.4: Vortrag

Dienstag, 27. März 2007, 17:45–18:00, H47

Raman intensity profiles of individual single-walled carbon nanotubes — •Martin Fouquet¹, Hagen Telg¹, Janina Maultzsch², Christian Thomsen¹, James Hone³, and Tony Heinz² — ¹Institut für Festkörperphysik, Technische Universität Berlin, Germany — ²Departments of Physics and Electrical Engineering, Columbia University, USA — ³Department of Mechanical Engineering, Columbia University, USA

We performed resonant Raman measurements on individual single-walled carbon nanotubes grown across a 100 micrometer wide slit. We collected intensity profiles of the radial breathing mode (RBM) and the high energy modes (HEM) by varying the excitation energy between 1.85 eV and 2.2 eV. In metallic nanotubes, the characteristic Fano-lineshape of the HEM is found, confirming that it is intrinsic to individual metallic tubes. We observe that the lineshape and peak positions depend on the resonance Raman condition, and their dependence on excitation energy is discussed.