Ed Yong has an interesting description on how a seventeenth century Damascus sabre made by Assad Ullah has tiny carbon nanotubes embedded into the sword to give it that super hard but ductile strength
Damascus blades are known for.

So with this new discovery of why Damascus blades are so good, will we be seeing blades in the near future that are as beautiful and strong being built by little nanobots?

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Carbon nanotechnology in an 17th century Damascus sword « Not exactly rocket science