Berlin 2012 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 60: Graphene: Raman Spectroscopy
HL 60.4: Vortrag
Mittwoch, 28. März 2012, 16:15–16:30, ER 164
Symmetry of phonon modes in functionalized carbon nanotubes — •Christoph Tyborski, Matthias Müller, Janina Maultzsch, and Christian Thomsen — Institut für Festkörperphysik, TU Berlin, Hardenbergstraße 36, 10623 Berlin, Germany
Polarization dependent Raman spectroscopy is used to analyse the symmetry of phonon modes participating in the scattering process of functionalized CNTs on unoriented samples.
In pristine CNTs the Raman signal mainly originates from the (z,z)- matrix element of the A1g mode. Contrary to unfunctionalized tubes, we found that the contribution of modes with E-symmetry in the Raman signal is slightly higher in functionalized tubes. We attribute this to a break in the high symmetry of CNTs due to functionalization.