Berlin 2012 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

O: Fachverband Oberflächenphysik

O 35: Poster Session II (Polymeric biomolecular films; Nanostructures; Electronic structure; Spin-orbit interaction; Phase transitions; Surface chemical reactions; Heterogeneous catalysis; Particles and clusters; Surface magnetism; Electron and spin dynamics; Surface dynamics; Methods; Electronic structure theory; Functional molecules)

O 35.148: Poster

Dienstag, 27. März 2012, 18:15–21:45, Poster B

Chirality Enrichment of Carbon Nanotubes by Amphiphile Replacement — •Marcus Ulf Witt, Antonio Setaro, Frederike Ernst, Pascal Bluemmel, Michael Gegg, and Stephanie Reich — Frei Universität Berlin, Institut für Experimentalphysik, Arnimallee 14,14195 Berlin

We present suspensions with selected enriched chiralities of carbon nanotubes. Such a suspension of selected chirality has well defined photoluminecence spectra and conductive properties. The chirality enrichment is achieved by the replacement of amphiphiles. The solvatochromic shift of the carbon nanotubes during the replacement was monitored with the photoluminescence excitation (PLE). From this PLE measurements we calculated the required concentration of the second amphiphile to replace the first one applying the Hill-model. The achieved enrichment was verified by the PLE. The use of amphiphiles with different morphologies leads to the enrichment of different chiralities depending on the coupling between amphiphiles and carbon nanotubes. This will help understanding the fundamental mechanisms of coupling between carbon nanotubes and aromatic moieties.