Carbon Nanotubes

Might as well try and describe what these things are.

Main design equation for the diameter of the CNT, dependent on the chiral numbers (n,m).

$$d_{t}=\frac{C_{h}}{\pi}=\frac{\sqrt{3} a_{c-c}}{\pi} \sqrt{n^{2}+n m+m^{2}}$$

Would go back to this site as reference. a_{c-c} is the length of the Carbon-Carbon bond, 1.421 Å.

http://www.photon.t.u-tokyo.ac.jp/~maruyama/kataura/chirality.html