Regensburg 2010 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 54: Nanostructured Materials V

MM 54.6: Vortrag

Donnerstag, 25. März 2010, 16:30–16:45, H16

Current-induced shaping of carbon nanotubes and their filling — •Markus Löffler, Stefan Philippi, Uhland Weißker, Thomas Mühl, Thomas Gemming, Rüdiger Klingeler, and Bernd Büchner — IFW Dresden, (P.O. box 270116, 01171 Dresden,) Germany

With the help of an in-situ nanomanipulator, structural changes and mass transport phenomena in filled and empty multi-wall carbon nano-tubes (MWCNT) under electrical bias have been studied inside a transmission electron microscope. The inter-shell resistance has been determined by subsequently removing nanotube shells with short time high bias transport. Electromigration and thermal activation have been determined as the main causes of current-driven mass transport, which has been studied in different regimes. Especially, fully reversible mass transport inside a MWCNT as well as current-induced directed growth of carbonaceous nanostructures has been observed. The knowledge of the measured properties of filled carbon nanotubes presents a starting point for the understanding of growth dynamics as well as for future applications in nanoelectromechanical systems (NEMS).