Dresden 2011 – wissenschaftliches Programm

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ISS: Intersectional Sessions

ISS 7: Transport and Spectroscopy in Molecular Nanostructures II (CPP, MO, related to SYMN)

ISS 7.4: Vortrag

Donnerstag, 17. März 2011, 11:15–11:30, TOE 317

Electronic properties of semiconducting polymer nanotubes — •Thomas Plocke¹, Matthias Müller¹, Janina Maultzsch¹, Christian Thomsen¹, Andreas Stefopoulos², Souzana Kourkouli³, Elina Siokou³, Kostas Papagelis³, and Joannis Kallitsis^2,3 — ¹Institut für Festkörperphysik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany — ²Foundation for Research and Technology Hellas, Institute of Chemical Engineering and High Temperature Processes (FORTH-ICEHT), 26504, Patras, Greece — ³University of Patras, 26504, Patras, Greece

Single-walled carbon nanotubes were functionalized with different polymeric quinoline chains using the "`grafting from"' approach in order to combine the properties of the semiconducting polymers with those of the carbon nanotubes [1]. We perform a resonant Raman spectroscopy analysis to study the influence of the functionalization on the electronic properties and the optical transitions of the modified tubes. We observe that the electronic properties of the nanotube derivatives change due to doping effects caused by charge transfer between the tubes and the polymers. Interestingly, our results on different functionalized single-walled carbon nanotubes show frequency shifts for the Raman G-mode in both directions compared to the pristine material. The preparation pathway of the studied samples allows us to distinguish structural from electronic effects caused by the polymer and the metal ion.[1] A. A. Stefopoulos, S. N. Kourkouli, E. Siokou, K. Papagelis, M. Müller, T. Plocke, J. Maultzsch, C. Thomsen, J. K. Kallitsis; in preparation (2010).