Animation of a flight through a carbon nanotube. Nanotubes are rolled sheets of graphene, a single layer of carbon atoms bonded in a hexagonal array. Nanotubes are being studied due to their high electrical conductivity and high tensile strength.

Royalty-Free Standard Licenses are granted for worldwide, non-exclusive and perpetual use, unless specifically noted otherwise. All Royalty-Free transactions are final. The Royalty-Free Standard license has no limitations and covers up to 15 users.