Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by specific context]
6. material components
7. molecules

Anotations

Scope note:

Hollow cylindrical molecules in the form of tubes measuring nanometers in diameter and composed entirely of carbon atoms. Carbon nanotubes have many potential commercial applications. They possess extraordinary strength and unique electrical properties, and are efficient conductors of heat. Nanotubes are already used in many common products, such as bicycle frames, automobile bodies, and tennis rackets.