This is how a 1 dimensional nanowire stores charge.
Excess charge electrons: the delocalized electrons, those not associated with specific atoms, follow circular orbits around the tube circumference. As in an atom, this motion causes one orientation of the electron spin to have lower energy than the opposite orientation. http://physics.aps.org/articles/v5/57 Focus: Electron Spin Influences Nanotube Motion Many delocalized electrons would orbit the diameter of the nano-tube in a cooper paired counter rotational spin up spin down couplet. The electron motion would be superconductive and the total excess charge would be proportional to the length of the nanotube. You can see that the maximum charge storage capacity would be very large for a macro sized nanotube. An excess charge concentration of just 2000 electrons would be enough to lower the coulomb barrier at the superconductive tip of the tube. Cheers: Axil
