Carbyne is a new allotrope of carbon which had been found in nature in 1968.

线型碳是1968年在自然界发现的一种碳的新同素异形体.

Owing to its effect of the surface and intrinsic lacuna, carbon nanotubes have perfect reactive ability than other allotrope of graphite.

碳纳米管的表面效应和管壁中存在有大量的拓朴学缺陷，使碳纳米管的表面本质上比其它的石墨变体有更大的反应活性。