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![Types of carbon nanotubes](http://upload.wikimedia.org/wikipedia/commons/thumb/5/53/Types_of_Carbon_Nanotubes.png/350px-Types_of_Carbon_Nanotubes.png)
Credit: User:Mstroeck
Carbon nanotubes (CNTs) are an allotrope of carbon. They take the form of cylindrical carbon molecules and have novel properties that make them potentially useful in a wide variety of applications in nanotechnology, electronics, optics and other fields of materials science. They exhibit extraordinary strength and unique electrical properties, and are efficient conductors of heat.