Abstract
Electron microscope imaging for gadolinium metallofullerenes encapsulating in single-wall carbon nanotubes identifies the single Gd atom encaged in each. The intermolecular distance between is extremely regular, regarding the chains of as novel one-dimensional crystals. Chemical state analysis of Gd atoms suggests evidence for charge transfer from Gd to either a fullerene cage or a nanotube. The slopes of the temperature dependence of electric resistance for the matlike films of and are much steeper than that for empty SWNTs, suggesting the electron scattering due to the electrostatic potential from inside fullerenes playing an important role.
- Received 7 June 2000
DOI:https://doi.org/10.1103/PhysRevLett.85.5384
©2000 American Physical Society