Dresden 2011 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 20: Transport and Spectroscopy in Molecular Nanostructures II (related to SYMN, jointly with CPP)
MO 20.10: Vortrag
Donnerstag, 17. März 2011, 12:45–13:00, TOE 317
Characterization of non-covalently modified carbon nanotubes by Raman spectroscopy — •Daria Kovalenko1,2, Anindya Majumder2, and Jörg Opitz1,2 — 1Fraunhofer Institute for Non-Destructive Testing, 01109 Dresden — 2Institute for material science, Dresden University of technology, 01062 Dresden
Raman spectroscopy is a technique which allows getting information about chemical structure of the molecules. Recently it got widely used for examinations of carbon based materials. In this study Raman and UV/VIS spectroscopic techniques were used to characterize the process of modification of carbon nanotubes. Single walled carbon nanotubes were non-covalently bounded using different surfactants. By UV/VIS spectroscopy it was established what surfactants react better with the nanotubes and therefore they become more soluble in water. Raman spectra of the dispersions were obtained. Using them, we got information about the structure of the carbon nanotubes. By the wavenumber of RBM-modes in spectra of the CNT dispersions diameter of the nanotubes were calculated and possible chiralities were proposed. By comparing G- and D-band intensities presence and amount of semiconducting and metallic carbon nanotubes were determined.