Editing Fullerene (section)

===Carbon nanotubes===
[[Image:Kohlenstoffnanoroehre Animation.gif|frame|This rotating model of a [[carbon nanotube]] shows its 3D structure.]]
[[Carbon nanotubes]] are cylindrical fullerenes. These tubes of carbon are usually only a few nanometres wide, but they can range from less than a micrometer to several millimeters in length. They often have closed ends, but can be open-ended as well. There are also cases in which the tube reduces in diameter before closing off. Their unique molecular structure results in extraordinary macroscopic properties, including high [[Ultimate tensile strength|tensile strength]], high [[electrical conductivity]], high [[ductility]], high [[Thermal conductivity|heat conductivity]], and relative [[Chemically inert|chemical inactivity]] (as it is cylindrical and "planar" — that is, it has no "exposed" atoms that can be easily displaced). One proposed use of carbon nanotubes is in [[paper battery|paper batteries]], developed in 2007 by researchers at [[Rensselaer Polytechnic Institute]].<ref>{{Cite journal |last1=Pushparaj |first1=V.L. |last2=Shaijumon, Manikoth M. |last3=Kumar |first3=A. |last4=Murugesan |first4=S. |last5=Ci |first5=L. |last6=Vajtai |first6=R. |last7=Linhardt |first7=R. J. |last8=Nalamasu |first8=O. |last9=Ajayan |first9=P. M. |display-authors=3 |year=2007 |title=Flexible energy storage devices based on nanocomposite paper |journal=[[Proceedings of the National Academy of Sciences]] |volume=104 |issue=34 |pages=13574–7 |bibcode=2007PNAS..10413574P |doi=10.1073/pnas.0706508104 |pmc=1959422 |pmid=17699622 |doi-access=free}}</ref> Another highly speculative proposed use in the field of space technologies is to produce high-tensile carbon cables required by a [[space elevator]].