Promotionsvortrag Physik: „Spectroscopic investigation of functionalized single-walled carbon nanotubes and gra-phene nanoribbons“

Ankündigung des Promotionsvortrags von: Frau Laura Meingast

Single-walled carbon nanotubes are hollow cylinders, formed by carbon atoms in a honeycomb lattice. They possess outstanding properties, making them attractive for many applications. To utilize them, their properties must often be modified, e.g. via functionalization. A new strategy for non-covalent functionalization is encapsulating nanotubes with ring-shaped molecules, forming mechanically interlocked carbon nanotubes (MINTs).

In this talk, I present a new MINT-system, based on the connection of positively charged ring fragments around nanotubes. First, I discuss the effects of this functionalization on the nanotubes’ properties and a potential diameter-selectivity in their enclosure. Further, I present an unexpected two-fold functionalization effect: nanotubes are not only encapsuled by the positively charged mac-rocycles but also filled by negatively charged iodide chains.

To explore the local effects of the MINT approach, I investigate thin, isolated MINT bundles via confocal Raman and tip-enhanced Raman spectroscopy. These challenging investigations pro-vide us with unique insight into the MINT material, down to the nanometer range.

(Vortrag auf Englisch)

Dem Vortrag schließt sich eine Diskussion von 15 Minuten an. Vortrag und Diskussion sind öffentlich. Diesen Verfahrensteilen folgt ein nicht öffentliches Rigorosum von 45 Minuten.