Carbon Nanotube
Carbon Nanotube is a scroll of a graphene sheet.
A nanotube can be either metallic or semiconducting,
depending on the tubule diameter and chirality.
(See also The Fullerene Patent Database.)
Permission is hereby granted to reproduce this picture
for university, academic, and other non-commercial purposes.
Riichiro Saito
saito@mgm.mit.edu
rsaito@ee.uec.ac.jp