Germanium-oxide-coated carbon nanotubes.
An ultrathin coating of individual multi-wall carbon nanotubes with germanium oxide was developed. Coated carbon nanotubes were prepared by in situ gelation of tetramethoxy germanium, forming an amorphous germanium oxide layer. The resulting germanium oxide/carbon nanotube nanocables were characterized by transmission electron microscopy (TEM), TEM/energy-dispersive x-ray spectroscopy, x-ray photoelectron spectroscopy (XPS) and current-voltage measurements. The approximately 10 nm thin germanium oxide layer provides excellent electrical insulating properties for individual carbon nanotubes.
Pumera
Martin
M
International Center for Materials Nanoarchitectonics and Biomaterials Center, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan. pumera.martin@nims.go.jp
Iwai
Hideo
H
Miyahara
Yuji
Y