Stone Wales defect

Stone Wales defect

The Stone Wales defect is a defect that occurs on carbon nanotubes (as well as graphene) and is thought to have important implications for nanotube's mechanical properties. The defects are thought to be responsible for nanoscale plasticity and the brittle-ductile transitions in carbon nanotubes.

One of the plausible processes for isomerization of the fullerene is the so-called Stone-Wales or "pyracylene" transformation, which is the 90° rotation of two carbon atoms with respect to the midpoint of the bond. The Stone-Wales transformation is also used to describe the structural changes of sp²-bonded carbon nanosystems. For example, it has been proposed that the coalescence process of fullerenes or carbon nanotubes may occur through a sequence of such a rearrangement. By the Stone-Wales transformation, four hexagons are changed into two pentagons and two heptagons.

References

* [http://cms.mse.berkeley.edu/elif/Research/CNTs.html Defects in Graphene and Carbon Nanotubes]


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