Dresden 2011 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 38: Poster: Colloids and Complex Liquids
CPP 38.29: Poster
Mittwoch, 16. März 2011, 17:00–19:00, P2
Dispersion study of Carbon Nanotubes — •Gerhard Lackner1, Viktor Bezugly2, Daria Kovalenko3, Anna Czeschik1, Richard Boucher2, Jan Meiss4, and Doru Lupascu1 — 1Institut für Materialwissenschaft, Universität Duisburg-Essen, Universitätsstrasse 15, 45141 Essen, Deutschland — 2Institut für Werkstoffwissenschaft, Technische Universität Dresden, 01069 Dresden, Deutschland — 3Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren Institutsteil Dresden, IZFP-D, Deutschland — 4Institut für Angewandte Photophysik, Technische Universität Dresden, D-01062 Dresden, Deutschland
In this study we focus on the dispersion of carbon nanotubes (CNT) and their characterisation using spectroscopic analysis. Single walled and multi walled carbon nanotubes (SWCNT, MWCNT) are used to form dispersions with different solvents. Besides surface-active agents we investigate a π-stacking approach to disperse the hydrophobic CNT. CNT bucky paper made by DNA-wrapped CNT dispersion include DNA. Covalent sidewall functionalisation of CNT to change their hydrophobic surface to a hydrophilic one will entail additional chains (commonly carboxylic chains) at the CNT sidewall due to the chemical treatment. If surface-active agents are used for preparation, a thoroughly rinsing after film preparation is necessary to remove agents. The π-stacking approach offers the advantage to evaporate all chemicals used for the dispersion via annealing and high purity is achieved. Therefore this technique could be a tool kit in organic semiconducting application.