Understanding the metal-carbon interface in FePt catalyzed carbon nanotubes.
Phys Rev Lett
; 107(18): 185501, 2011 Oct 28.
Article
en En
| MEDLINE
| ID: mdl-22107641
ABSTRACT
Any tip functionalization of carbon nanotubes, for which the relative orientation between their (metallic) catalyst particle and the nanotube axis is essential, requires a detailed knowledge of the nature of the internal interface between the particle and the outgrown tube. In the present work, this interface is characterized with atomic precision using state-of-the-art low-voltage aberration-corrected transmission electron microscopy in combination with molecular dynamics simulations for the case of hard-magnetically terminated carbon nanotubes. Our results indicate that the physical principle based upon which the interfacial metal facet is chosen is a reduction of the desorption energy for carbon.