Dresden 2009 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 14: POSTERS Nanoparticles
CPP 14.13: Poster
Dienstag, 24. März 2009, 14:00–16:30, P3
Raman Spectroscopic Study of Plasma Functionalized Carbon Nanotubes (CNTs) — •Verena Katzenmaier1,2, Jakob P. Barz1, Nicolas P. Zschoerper1,2, Michael Haupt1, Uwe Vohrer1, Christian Oehr1, and Thomas Hirth1,2 — 1Fraunhoferinstitut Grenzflächen- und Bioverfahrenstechnik, 70569 Stuttgart — 2Institut Grenzflächenverfahrenstechnik, Universität Stuttgart
Raman spectroscopy is well known as a powerful tool for the characterization of carbon structures. In the case of CNTs, Raman spectroscopy provides a deep insight into their physical properties as well as the material quality. In resonance conditions, the Raman scattering process is strongly influenced by the electronic states of the system: in the case of single walled nanotubes, this is seen by e.g. the van Hove singularities.
In order to get a fundamental insight in structural properties and effects of chemical functionalization via low pressure plasma treatment, measurement conditions were varied in different ways: bulk material in the form of bucky papers was probed by a confocal system with three different excitation energies (e.g. 488 nm, 632.8 nm, 785 nm). In addition, the CNTs were measured with a tunable laser system in order to probe resonant scattering processes.
We focused on the low-frequency radial breathing mode for studying the nanotube diameter distribution of our samples as well as the conducting properties of the tubes.