Regensburg 2004 – scientific programme
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HL: Halbleiterphysik
HL 48: Kohlenstoff/Diamant
HL 48.2: Talk
Friday, March 12, 2004, 11:15–11:30, H17
Raman based structure assignment of Single-Walled Carbon Nanotubes — •Hagen Telg1, Janina Maultzsch1, Stephanie Reich2, Christian Thomsen1, and Frank Hennrich3 — 1Institut für Festkörperphysik, Technische Universität Berlin, Germany — 2Department of Engineering, University of Cambridge, United Kingdom — 3Institut für Physikalische Chemie, Universität Karlsruhe, Germany
Nanotube samples made by any method still contain all types of tubes which differ in chiral angle and diameter. The radial breathing mode (RBM), which strongly depends on the tube diameter, is frequently used to determine the chiral angle of the tubes. We studied Raman spectra of several samples varying in diameter distribution. We also distinguished between isolated tubes in aqueous surfactant suspensions and bulk samples. In order to obtain band gap information we took resonance profiles for different energy regions in the visible. To assign the RBMs to a specific nanotube type we compared our data with results from photoluminescence measurements and theoretical predictions.