Regensburg 2007 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 40: Particles and Clusters I
O 40.6: Vortrag
Mittwoch, 28. März 2007, 17:00–17:15, H38
Resonant Raman Scattering on Functionalized Carbon Nanotubes — •Matthias Müller1, Janina Maultzsch1, Christian Thomsen1, David Wunderlich2, and Andreas Hirsch3 — 1Inst. für Festkörperphysik, TU Berlin — 2Zentralinst. für Neue Materialien und Prozesstechnik, Univ. Erlangen- Nürnberg, Fürth — 3Inst. für Organ. Chemie, Univ. Erlangen-Nürnberg, Erlangen
We report Raman measurements on carbon nanotubes functionalized with diverse alkenes and various degrees of functionalisation. Selective reactions of the different tube species (metallic or semiconducting) due to the availability of electrons near the Fermi level were first reported by Strano et al.[1]. Our work focuses on resonant Raman scattering of the radial breathing mode (RBM) concerning the preferred addition of the nuclephile to metallic tubes as suggested by Graupner et al.[2].
Assigning the chiral indices of the tubes by means of the so-called Kataura plot[3] we can study the influence of functionalisation on the transition energies of either metallic and semiconducting tubes in detail. Data of the high energy (HEM)- and defect-mode (D-mode) will also be discussed.
[1] M. Strano et al., Science 301, 1519 (2003) [2] R. Graupner et al., J. Am. Chem. Soc. 128, 6683 (2006) [3] J. Maultzsch et al., Phys Rev B 72, 205438 (2005)