Regensburg 2013 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 25: Topical Session: TEM-Symposium - Structure-Property
MM 25.2: Vortrag
Dienstag, 12. März 2013, 15:30–15:45, H4
High-resolution TEM study on carbon nanotubes grown from Fe20Ni80 nanoparticles — •Anja Kiessling1,2, Darius Pohl1,2, Christine Täschner1, Mark Hermann Rümmeli1, Rolf Erni3, Ludwig Schultz1,2, and Bernd Rellinghaus1 — 1IFW Dresden, D-01069 Dresden, Germany — 2TU Dresden, Department of Physics, D-01062 Dresden, Germany — 3Electron Microscopy Center, Swiss Federal Laboratories for Materials Testing and Research (Empa), CH-8600 Dübendorf, Switzerland
With the aim of studying the interface between the catalyst nanoparticle (NP) and the graphene layers, Carbon Nanotubes (CNT) were grown from Fe20Ni80 ("permalloy") NP on silicon substrates. Aberration-corrected high resolution transmission electron microscopy (FEI TITAN3 80-300) was used to characterize the as-grown CNT.
Recent results obtained with CNT grown from FePt catalyst NP showed an energetically favoured facet for the release of carbon [1]. For the CNT grown from permalloy NP a similar behaviour is predicted from MD simulations and preliminary experimental results are in accord with that. Furthermore, by changing the growth parameters we were able to produce CNT filled with SiC nanowires. These CNT show a strongly distorted lattice. Within a model this behaviour can be explained.
[1] Pohl et al., PRL 107 (2011), 185501.