Concord Consortium
Concord Consortium: Molecular Workbench Showcase: Nanotechnology
A collection of simulations on nano materials, nano applications, and machinery at the nano level. Students can learn about carbon nanotubes, material strength, a conveyor belt made on the nanoscale, and sputttering.
Wikimedia
Wikipedia: Carbon Nanotubes
This site is an explanation of what nanotubes are and how they can be used. It has an excellent discussion of both the history and future of these carbon structures. A Chinese translation is available.